After upgrading from MOSS 2007, when we try the new interface (preview mode), some context menus are not working - if a user clicks e. g. view properties, edit properties, approve/reject... etc, nothing happens. When the user clicks the "Edit item" icon, it works fine.
It happens only sometimes and to some users. There are some customizations, but nothing serious - for example an inserted CEWP above the list - but only sometimes.
Any ideas?