PHP errors since Piwik 0.2.34

I have been getting this error on every page view since upgrading to 0.2.34:

[20-Apr-2009 08:45:47] PHP Fatal error: Class ‘Zend_Registry’ not found in /xxx/admin/piwik/core/Common.php on line 56

I think this has caused visit logging to cease.
Any ideas? Its been a great update otherwise.

Perhaps try a complete install from scratch - backup everything first of course style_emoticons/<#EMO_DIR#>/smile.gif Looks like a file may not have been written properly during the update…

A complete re-install (and creation of a new MySQL DB) did not help. Still the same error and it is not logging either.

Update: its working now. Entirely my fault - was using an old piwik.php that I had modified for security purposes. Case closed.