After our performance issues with this site over the last two weeks, during which many changes were made to bring down CPU usage, we've got that old bug with system cache where it mangles SEF URLs.

For the record I have the system cache plugin turned off, native Joomla SEF URLs turned on in Global Config, and Caching turned on in Global Config.

It results in incorrect SEF URLs over time, e.g. the forum link instead of being www.joomladay.org.au/communityforum suddently turns in to www.joomladay.org.au/index.php/somethingelse/communityforum.

This bug has been around since early versions of J1.5 but since we are on J1.5.15 I'm surprised it's still there.

I've seen various suggestions for fixing it, including moving the system SEF plugin to the top of the list (fires first) and setting Global Config var $live_site = 'www.joomladay.org.au'; The latter is very annoying as it auto-adds the 'www' to the site name when viewing the site. If you leave out the 'www' in the variable, you can't log in on the site. I've unset it, as anyway not sure it's fixing the problem.

I've also turned site caching off, so that menu entries work.

If anyone has a documented solution, please let me know.

thx
Dex

Oh, and another error is that it sometimes breaks my templates and fails to load the css. Yet to find time to investigate this one.

Hmm.. the only way I've ever got around this is by using a third party SEF component.