I've just upgraded Wordress from 2.7 to 2.8. I noticed that ajax-options in the admin area (such as dropdown menu's) and the plugin overview didn't work anymore. After a lot of clicking, I narrowed it down to yarpp. If I enable this plugin, the problem occurs. If I keep it disabled, everything works like a charm.
I'm running the latest version of yarpp (3.0.6), so I haven't got a clue what causes this. Anyone?