Fix a major bug in release 5.x-2.3 as described in #396222: Version 5.x-2.3 is broken. It looks like the tag was corrupted in CVS as both CVS and the release package are damaged.
This should fix things as this is a new release created from the (health) DRUPAL-5 branch.
Bug fixes:
- Added t() call to "cached search results cleared", "index optimized" messages in admin page.
- Fixed incompatibility with module modules that use class_exists(), including Views 2.
- Modified release mechanism for ZF components to deal with bug fixes on the ZF end.