Solved. I had to do a complete reinstall of WP 2.9.2 and then – once again – update to 3.0. Now it works fine!
Anyway, thanks Esmi for your help!
No, it’s not hidden. It’s hard for me to describe accurately how it looks so I made a screenshot from my Dashboard:
http://picasaweb.google.pl/lh/photo/B0eNT0MiXMEiNFZ6nQNVGw?feat=directlink
Oh… it’s possible!
If you say so 😉
Did you try resetting the plugins folder? Or increasing the available memory?
Already done that… And – of course – nothing changed.
Thanks for advice, Esmi. I deactivated plugins, switched the theme but nothing happened. Personally, I doubt if it’s possible to deactivate some WP core features by plugins or threme…