Below is the changelog for iLister listing script (v.4.2.2 and above): 

From v.4.7.0 to v.4.7.1:

Enhancements:

1. Wording for various messages improved for iLister listing script
2. Improved text of the notification about cancellation of automatic listing extension
3. Added default translations for the Filter and Deactivate buttons
4. Misaligned elements on the advanced search form corrected.
5. On the “Manage Users” page of the admin panel, replaced error code with a user-friendly message on actions with bulk credits
6. Made date format consistent across the admin panel
7. Replaced the wrong title on the credit package management page in the admin panel
8. Misaligned elements on the “My Listings” page corrected.
9. Updated copyright notices
10. Listing import refactored to improve stability and support for ZIP and TAR.GZ archives for import

Bugfixes:

1. JavaScript error caused by trailing slash at the end of a Tree field value is fixed
2. Import of Tree field values corrupts ordering - fixed
3. Improved default translation for menu items
4. Corrupted layout on the My Listings page fixed
5. Image upload during user registration fixed
6. Slash in phrase ID’s caused search errors - fixed
7. Fixed listing search email notifications that contained duplicate listing IDs before
8. Replaced PHP warning with a user-friendly message on the Subscription page
9. Fixed browsing pages that contained misaligned element in the bar on top of the page
10. New trusted group users were not trusted if created via admin panel – problem fixed
11. Submitting the Listing Import form without specifying the import file does not trigger a php warning anymore
12. Two or more fields of “Tree” type on the same form do not work properly – problem fixed
13. Replaced Error ID with a user-friendly message if no file was uploaded when importing listings
14. Fixed the “Subtract Credits” button that wrapped to a second line and corrupted alignment in IE
15. Corresponding user friendly error message appears when uploading an archive containing no .xls files
16. Missing translation on “My Transactions” page added 
17. Corrupted messages are fixed and missing translation on the listing edit page is added
18. Bulk subtract credits function that validates user input is fixed
19. Search page reloads from now on with updated form when a different listing category is selected
20. Missing default translation for the “Buy Credits” page added
21. Missing default translations for the moderation status field added

From v.4.6.1 to v.4.7.0:

New Features:

1. Credit Points System implemented for iLister listing script
2. Automatic Listing and Plan Renewals functionality added
3. Ability to send notifications about renewals added
4. Ability to view the package details for every listing
5. Admin can change package settings for a particular listing or group of listings.
6. Ability to search/filter listings based on listing packaged used by the listings added
7. Ability to apply any package to a particular listing added
8. Package Sync Utility added - Synchronization of listing packages with membership plan packages via admin panel
9. Easy creation of custom content pages added
10. "Make user trusted after registration" option for a user group added

Enhancements:

1. Listing activation mechanism improved
2. Error code replaced with a human-readable message
3. The look of credit charge confirmation prompt page enhanced
4. Ability for the administrator to leave a comment when credits are added or subtracted in the admin panel
5. Ability to display all available membership plans to users added
6. Enhanced wording of the listings auto-extension and expiration report
7. Auto-extension report are not sent to users, who's "Notify on listing expiration" setting is off
8. Listing and subscriptions auto-extension report to admin are not sent unless "Notify on User Contract Expiration" and "Notify on Listing Expiration" are On respectively
9. Renamed "Transactions" page to "Payments" in admin panel
10. Added a listing package information on the listing edit page in admin panel
11. Added a "credit_name" custom setting
12. Added a date range filter for credit transactions
13. Enhanced the layout of listing edit page in admin panel
14. Enhance the layout and look of credit purchase page
15. Added default translations for phrases on the pay for listing page
16. Enhance descriptions of default membership plan packages
17. Brought the layout and look of the credit purchase page into consistence with other page based on the theme design
18. Made message on rating page more user-friendly
19. Added the confirmation about successful listing saved both in admin panel and on front-end.
20. Added internationalization and default translations to contact seller form and comparison table pages
21. Replaced error code with a human-friendly message on the listing feature activation page.
22. Added link to product's manual from admin panel
23. Displaying variable values in internationalized phrases even if translation is missing
24. News are updated in initial database dump
25. Year 2010 added as upper limit for Year field
26. Batch addition of credits to users in admin panel added
27. Batch addition/subtraction of credits via admin panel added
28. Ability set user balance notification threshold added
29. Ability to add credit to a user balance via admin added
30. Low balance notification added for iLister listing script
31. Ability to set initial balance in user group settings added
32. Updated product documentation
33. Current subscription details are displayed on the "Subscription" page
34. Ability to chose another package (if available) after listing expiration added

Bugfixes:

1. Listing auto-extension now sets right parent package if for the listing package
2. Ambiguous transaction table layout fixed: figures don’t stick to status values now
3. Dead link in the admin panel's breadcrumbs on the "Add Credit Package" page fixed
4. Missing comment for the initial balance transaction added for iLister listing script
5. Added listing package information on the view listing page in admin panel
6. Auto-extension of user's subscription is canceled if membership plan had been changed by the administrator
7. Missing $KEYWORDS and $DESCRIPTION are added in several themes
8. Garbage images and video files are deleted now from the hard drive when corresponding listing is deleted from the website
9. Field separator setting is not ignored now when listing are imported from a CSV file
10. Missing Google Map on the printer-friendly listing pages is added
11. imagedestroy() is now called on unused GD image resources.  This fix should improve memory usage in some cases.
12. Error message is displayed when invalid field id is specified in templates instead of String-type text-box.
13. Date format is now validated in Calendar fields
14. Missing Default translations for several phrases added
15. Missing "Next" link in iauto3 theme added
16. Display Your Email setting is not ignored now
17. "Compare Ad" link is not split now when line is wrapped on the search results page in iauto1 theme
18. White background around rating stars on yellow listing background fixed
19. Watermark settings manual is improved
20. Problem with listing activation date  resetting when listing feature (Youtube, slideshow, highlighted) is activated is fixed
21. User profile field doesn’t conflict with listing field if fields have same id any more
22. number_of_cols parameter is not ignored now in iLister's featured_listings function call
23. Problem with user search result if user group profile does not have any fields fixed
24. Search results paging error in IE7-8 fixed
25. Minor standard nonconformities in RSS feeds fixed
26. Missing Boolean fields on the listing display page fixed
27. iLister's edit listing page layout of character counter fixed
28. Invalid package filter applying to listing search on Manage Listing page in admin panel fixed
29. Missing numbers of expired listing in listing expiration report fixed
30. Converted new lines in all text-based files in distribution package to UNIX-format
31. FeeBased subscription expiration problem fixed
32. Saving parent package for contract packages fixed
33. Expiration of subscription-based contracts forces listing expiration
34. Subscription extension activates listings that are not yet expired – problem fixed
35. Manually deactivated listing now retains expiration date and can be activated back free of charge

From v.4.6.0 to v.4.6.1:

Bugfixes:

1.  task_scheduler won't initialize I18N on some hostings
2. Newly registered user's username is inserted instead of admin name into the admin login box when new user notification link is followed.
3. Video upload does not accept 3gp-files.
4. Inconsistent week layout on calendar control
5. Change to list value in listing will also change another list value if previous values where identical regardless of field ids
6. Additional SET CHARACTER SET at initialization of database connection makes data in database corrupt on some hostings
7. Business catalog won't save brief description for entries.
8. Auto notify won't work in iAuto and iRealty
9. Auto notification is not working for searches saved with listing_type criterion.
10. I18N won't initialize on some search pages. Produces errors if search link is copied into the fresh browser.
11. Time is ignored in task_scheduler_last_executed_date setting

From v.4.5.0 to v.4.6.0: 

New Features:

1. Corporate Seller Profiles
2. Seller Inventory
3. SEO-Friendly Seller Ads Page added
4. Contact User page
5. Slideshow added for iLister listing script
6. YouTube Videos
7. Highlight Ad
8. WYSIWYG editor for text fields introduced 

Enhancements & Bugfixes

26 MINOR BUGFIXES & SEVERAL ENHANCEMENTS 

From v.4.4.0 to v.4.5.0:   

New Features:

1. Import User Profiles from CSV or XLS files function added
2. Compare Listings feature added
3. CAPTCHA for Forms added
4. Max Symbols Allowed for text and input fields added
5. Watermark for Uploaded Images
6. Ratings are added to all types of listings
7. Export User Profiles to XLS file

Enhancements & Bugfixes:

1. Paging for the Manage Users section in the admin panel introduced 
2. The issue with the ability to create a user profile field with field type undefined fixed 
3. "Fields marked with an asterisk (*) are mandatory" note to all forms in admin panel added 
4. The "You can post your listing now" link on the subscription page added 
5. The broken form field labels layout in narrow browser window on the General Settings page corrected 
6. GMaps display in IE fixed (using jQuery)  

From v.4.3.1 to v.4.4.0  

New Features:

1. Logout link added to the Admin Panel
2. Introduced the Multiple Picture Upload interface
3. RSS-feeds added, including latest X listings and featured listings feeds
4. Pre-moderation and Post moderation of all listings
5. Mark Listing as Sold feature added for iLister listing script
6. Enable JavaScript and Cookies for Best User Experience notice added
7. Ability to expire Membership plans for existing users added
8. Display listing address/zip on the built-in Google Map
9. New SEO/SEM feature, Share Your Website, added
10. Trusted Users option is added
    

Enhancements & Bugfixes:

1.  Improved the add picture interface when adding links via the admin
2. FCKEditor is upgraded to version 2.6.3, better and stable version of the editor 
3. Minor hints on supported picture and video formats added  
4. Tips and help information added to the Admin Panel interface  

From v.4.3.0 to v.4.3.1

Enhancements & Bugfixes:

1. Optimized listings search in task_scheduler.
2. Session check mechanism modified.
3. Optimized and improved performance, reduced load times.
4.  Fixed empty date field in I18N.
5. Added date format help message.
6. System behavior after deleting user acct corrected. System logs user out now.
7. PayPal payment issue fixed for iLister listing script
8. The float field type for I18N fixed.
9. System can now search within tree type levels (restriction to top level removed).
10. Resolved the challenge with browsing by incomplete tree field.
11. The 'video' validation issue fixed.
12. Inconsistent RewriteBase in admin/.htaccess file fixed.
13. Fixed the permission issue in the cache folder for themes cloned.
14. Special symbols in phrase IDs fixed.
15. Payment completion issue for non-English product versions fixed.
16. Duplication of Form class in classifieds/Form.php removed.
17. Upper/lowercase symbols in phrase translations fixed.
18. Corrected categories for built-in business catalog.
19. Duplicate field names in input forms with multiple tree fields fixed.
20. The listing count for browse by tree fixed.
21. The payment creation date bug fixed.
22. The "Previous" and "Next" links fixed.
23. Corrected the mechanism of adding logo during user registration.
24. Add video routine improved.
25. Fixed the add/edit listing in the Admin Panel.
26. The video play mode bug fixed.  

 From v.4.2.5 to v.4.3.0

1. Created the 'Contact Form' functionality. Default page for the contact form: http://YourWebsiteURL/contact/
2. Added a new system setting: Radius Search Unit. The choice of radius search unit (miles\kilometers) will affect the search by the distance.
3. Fixed the issue with incorrect line endings in email message header
4. Fixed the issue with overlapping float field setting 'Signs number after comma' by language setting 'Decimals'
5. Internationalization module integration
6.  ilister_standard theme internationalized 

From v.4.2.4 to v.4.2.5

1. Fixed the issue with category selector on the Export Listings.
2. Fixed the issue with import pictures on the Import Listings.
3. Added the semicolon as delimiter for csv file type on the Import Listings.
4. Fixed the issue with invalid caption of the last category.
5. Fixed the issue with counting the number of listings in the categories.
6. Fixed the issue with low productivity.
   

From v.4.2.3 to v.4.2.4

1. Fixed the issue with sorting by 'id', 'listing_type', 'activation_date' and 'username' system fields on the search/filter results pages.
2. Fixed the issue with sorting by 'pictures' system field on the search/filter results pages.
3. Added category selector in My Listings page.
4. Fixed the issue with database connection isolation.
5. Fixed the issue with category selector in Manage Listings page.
6. Fixed the issue with paging when listing deletes.
7. Added 2CO new cart purchase parameters.
8. Fixed the issue with sorting by 'Price' on the My Listings page.
9. Added Zend encoded core.
   

From v.4.2.2 to v.4.2.3

1. Fixed the issue with field IDs. When the 'field ID' is changed from the admin panel, all the fields will be updated in the database.
2. Fixed the issue with the 'Listings per page' parameter in search results.
3. Fixed the issue with redundant browsing parameter in the URL.
4. Fixed the issue with fields of 'tree' type marked as required.
5. Improved the design for the 'Edit' and 'Delete' buttons in the admin panel.
6. Fixed the issue with product installation.
7. The quick search form will no longer redirect to the advanced search form after choosing a category.
8. Fixed the issue of product incompatibility with MySQL v.4.1
9. Fixed the issue with category parameter 'order' after category adding.
10. Fixed a security issue.
11. Fix encoding problem, Set output data encoding to utf-8 in import listings from xls file
12. Fixed an issue with pages with a slash at the end.
13. Fixed the issue with deleting subcategories together with its parent.
14. Fixed the search by category.
15. Fixed a validation issue for 'video' fields when listing is created.
16. Change mechanism of HTML filtration, filter HTML in Email class, Form class and display_listing.php module function. 

From v.4.2.1 to v.4.2.2

1. Main iLister functions were optimized, such as 'Add a listing', 'Browsing', 'Search listings', etc.
2. Added a possibility to move a category (with subcategories) up or down on a level.
3. Added a possibility to move a category up or down through any number of adjacent categories (adjacent categories have the same parent category and level).