I can't see any differences between 2.5.4 and 2.5.3.
 
Any ideas? Anyone?

Hello Anthony
 
Here the list of additions to v2.5.4:
· Fixed problem with RSS
· New “order” field for languages
· Ability to add products options per product type (saves a lot of time than setting up individual options for each)
· Ability to set more than one price per product for different users groups
· Created script for exporting date into UPS (admin_export_ups.php)
· Polish language
· ePDQ CPI payment system
· Improvements for Authorize SIM payment system
· Ability to resume downloads
· Option to enable the clearing of shopping cart after logout (to save problems on computers with multiple users)
 
Thanks,
Yoda