Sometimes it happens, that Typo3 gives creates an error in the Frontend after an extension has been updated:
Fatal error: Class 'tx_some_extension' not found in class.t3lib_div.php on line 4856
Sometimes it happens, that Typo3 gives creates an error in the Frontend after an extension has been updated:
Fatal error: Class 'tx_some_extension' not found in class.t3lib_div.php on line 4856
This is due to some cache files not being deleted (I don't know when exactly this happens and why its not cleared by Clear all cache)...
Deleting the contents of typo3temp/Cache/Code/
or the entire folder should solve this problem. Everything needed will be generated again with the next request.