Kake has now released version 0.35 of OpenGuides, and I would recommend that everyone upgrades to it as soon as possible. The change that this version brings is the ability to delete specific history versions of any node; this is an important tool to combat wiki spammers, who are becoming increasingly common. Up until now, even if you reverted their change, their spam would remain in your database forever and still be available in node history. This is now no longer the case. So, I suggest upgrading as soon as possible (requires the new CGI::Wiki 0.54).
My thanks to Kake for implementing this so quickly after it was suggested.
Cheers,
Earle.