Mediawiki opens allway in the topframe even if you have an url to the rightframe. I changed that with help of the archive. That's working everywhere, besides on my own computer: in Firefox. (Explerer 7 is allright - but I tried that after the change, not before. I cleared the cache of Firefox, the tempfiles of Windows (you never know). I added on advise of Chris in an other discussien the local settings to:

$wgEnableSidebarCache = false; $wgCachePages = false; (is that what you meant, Chris?)

Still firefox opens without the sidebar of the site it is placed in - that is: only on my own computer. Of course I can live with that, but it's quite a bother. Rein