Ok, I think I found the answer to this in an old e-mail, it turns out it was a problem with load balancing and not php 5. Thanks.
http://mail.wikipedia.org/pipermail/mediawiki-l/2005-April/004336.html
On 8/23/06, Travis Derouin travis@wikihow.com wrote:
Has anyone had any issues running MW 1.6.7 and php 5.1.2 together? We're seeing some odd things like rollbacks failing because edit tokens aren't matching, and wpEditTime's aren't being set properly, so revert's having been working for us.
Thanks, Travis