CSS error?

It looks as if there is a CSS error in the add category window under "Additional Information". Firefox 15.0.1 Mac, Safari 5.1.7 OSX 10.6.8 Windows are overlapping so you can't get to the underlying selections.

Screenshot here: screencast.com/t/ajdD1aLhFpX

It sounds like a problem with your backend template.

Can you try to use the default joomla backend template and see if you still have the problem ?

It works fine in bluestork. Thank you. I will pass this on to the template developer.