This is a brief list of changes between Akeeba Backup 3.1.1 and the previous release, 3.1 Stable.
Changes and additions
Ability to customize the front-end and remote backup email subject and body
FTP directory browser for the configuration of the DirectFTP archiver engine
Ability to update from the developer releases update stream
Improved live update download method
Bug fixes
Filesystem Filters would return an empty directory on some hosts
Obsolete count quotas were throwing an SQL error
Lazy Scheduling plugin's reset would not remove the lock, preventing further automatic backup jobs
False warnings about unreadable files issued on some directories under Windows
Would not install on Joomla! 1.6 Beta 13 or later due to API changes
All dates and timestamps appeared wrong under Joomla! 1.6 Beta 13
Double debug information printed when Joomla! Debug System is enabled and the Lazy Scheduling is activated
Lazy Scheduling's time calculation was off by a day in some cases
The wording of the FTP error message when an invalid hostname or port is given was confusing to the users
File and Directory Exclusion filters wouldn't be applied to Off-Site directories (Professional release only)