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
Joomla! version: 2.5.6
PHP version: 5.2.9
MySQL version: 5.1.35
Host: AISO.net (Apache/2.2.3 CentOS)
Akeeba Backup version: Last Stable
Description of my issue: After last upgrade the restore point fails when installing anything that required an incremental backup, posts 500 error. I followed the instructions (below) and tried the upgrade link in Admin Tools (which had failed before), it worked.
I read: "#13108: Restore Point / Akeeba Installer broken since upgrade." to understand the problem. Thanks for great products and your excellent support ticket system.
Your complete instructions are here:
It turns out that Akeeba Backup 3.6.0's System Restore Points feature is not compatible with PHP 5.3 and I never tested it with PHP 5.2 (I only tested full backup scenarios with PHP 5.2). The incompatibility was introduced due to the changes I made to make the component compatible with the upcoming Joomla! 3.0. I have good news, though! It seems that there is a workaround. Please download and install the latest dev release. Don't freak out because it's listed as alpha; it's very stable. The only changes since 3.6.0 are the bug fix in question and a CSS fix for the Live Update icon floating behind the right-hand column in Akeeba Backup's Control Panel page.
In order to test the dev release please disable the "System - System Restore Points" plugin and install the dev release on top of your existing version. Then re-enable the "System - System Restore Points" and try installing another extension so that you trigger the system restore points. The SRP backup should complete successfully and the extension installed.