Steps to reproduce the issue

Upgrade Joomla - dont clear cache - blame Joomla for being crap

Expected result

Joomla works

Actual result

Joomla doesnt work

System information (as much as possible)

Caching enabled, browsers cache...

Additional comments

• TODO: Implement a "Now you have upgraded CLEAR YOUR DAMN CACHE! ALL CACHES! EVERYWHERE! type notice thats in big red letters about 100px high and with a massive claxon sound going off at full volume

• TODO investigate better cache busting techniques