I recently logged a call in the Wordpress section before reading that I should have logged it here - apologies for that!
Wordpress v3.9
PHP: 5.4.21
MYSQL: 5.1.72-cll-lve
Backups work fine, dropbox upload now works fine in b3 version.
Further comments about v1.0b3 which you may or may not be aware of:
The version of php on my servers is 5.4.21, however on the update page, Akeeba displays the PHP warning message, even though it's in excess of stated minimum version requirements. Incidentally, un-checking the "Display a warning message when PHP is outdated" does nothing - the warning still appears. Version information is all correct.
I guess this breaks the update function in Wordpress, as I was unable to automatically update the plug-in and there was no notification that an update was available (on the wordpress plug-in page).
Thanks for the good work :)
Regards
Alan.