[ozzy47]

Officially no, but.

As for reverting, there are no database changes from 4.2.1 to 4.2.2, so you could quite easily re-upload 4.2.1 and it would work.

Ok here is what I would do.

1) Turn your site off.

2) Make a full backup, just incase something goes wrong.

3) Then get a copy of v4.2.1 Pl1 upload those files to your server.

4) Turn on debug mode by adding the following to your includes/config.php

$config['Misc']['debug'] = true;

5) Go to ACP --> Settings --> Options --> Version Info and Other Untouchables, and change ONLY the setting, vBulletin Version Number to 4.2.1

6) Turn off debug mode by removing the following to your includes/config.php

$config['Misc']['debug'] = true;

7) Remove the install directory.

8) Turn your site back on.

Now you will be upgraded to v4.2.1 and not have to worry about the 4.2.2 and PHP errors.