Have I read the related troubleshooter articles above before posting (which pages?)? Yes
Have I searched the tickets before posting? Yes
Have I read the documentation before posting (which pages?)? Yes (Using webcron.org to automate your backups)
Joomla! version: 2.5.4
PHP version: 5.3.6
MySQL version: 5.1.61-cll
Host: norskvann.no
Akeeba Backup version: 3.5.a2
EXTREMELY IMPORTANT: no log file
Description of my issue: Essential the same as #12272. Backend backup works fine. Frontend backup worked according to plan until my recent update to 3.5.a2, whereupon the 403-error started. (403 - Not authorized to view this page)
I have re-checked possible typos without finding any.
Other solutions?