Compare Revision

I got this massages when I click Compare Revision @ history

Don't let this happen again. Go Back. Self-comparison detected.
Initiating infinite loop eschewal protocol.
Self destruct in... 3
2
1
Wake up, ...The Matrix has you...Follow the white rabbit.

The same thing happened this web that using Wordpress Wiki
http://1two3.co.za/classroom/wiki/mapwork/?action=history

Can help me to tell how to fix this problem?

Thanks for the help
Romi Mardela