FAQ/Misc. problems after upgrade

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Miscellaneous

There are some situations which can cause incomprehensible problems after an upgrade:

• If extensions override classes where functions have changed.
  Solution: try to disable extensions and enable them one by one again util it fails.
• If a PHP cache somehow fails to re-cache scripts, in particular if a change happend to a parent class overridden by a childclass which was not updated.
  Solution: remove all cached PHP files (for PHP-Accelerator, remove /tmp/phpa_*) and restart Apache.