I saw a ticket the other day where a customer received this error from Horde when trying to expand items on the left pane of the interface:
Fatal error: Cannot use string offset as an array in /www/horde/lib/Horde/Block/Layout/Manager.php on line 389
It turns out that Plesk 8.1.1 bundles Horde 3.1.3 which has an occasional bug within the [...]
If you’ve used newer versions of Horde with Plesk, you have probably noticed the news feed that runs down the left side of the screen. Depending on the types of e-mails you receive, you may get some pretty odd news popping up on the screen.
Luckily, you can remove the news feeds pretty easily. [...]
There’s a few issues with PHP 5.2.5 and the version of Horde that is bundled with Plesk 8.1.x and 8.2.x. The PHP include paths that appear in the Apache configuration generated by Plesk conflict with the PHP installation, and that causes the Horde webmail interface to segmentation fault.
To fix the problem, create a file [...]