Scott T. Emery wrote:
MediaWiki (http://wikipedia.sf.net/): 1.4rc1
Before investigating *anything* else, this needs to be upgraded to the current 1.4 stable release.
As for possible caching issues: check that clocks are correct, headers are being sent correctly, and if a reverse squid proxy is being used make sure that it's set up properly and purge requests are being sent and accepted.
-- brion vibber (brion @ pobox.com)