I just updated my site from 7.0 to 7.18, the forms in admin overlays no longer work, this concerns any pages related to admin: www.mysite/admin/*
The forms always reset back to their previous values. Plus on the modules page when clicking 'save configuration', I am redirected from www.mysite/admin/modules to www.mysite/admin/modules/list/confirm.
www.mysite/node/ overlay forms work fine.
Does anyone have any ideas?