VBA IDE: Problem with disabled toolbars.

I am experiencing a strange issue with the toolbars in the VBA IDE.
Example:
I am editing a module but the 'Edit' toolbar is completely disabled.
If I move this toolbar around a bit or undock and then redock it, the toolbar is 'magically' enabled.
If I now switch to a userform and select a control, the 'Edit' toolbar stays enabled.
Again I have to move it around for it to update and become disabled.

Does anybody know what is going on and how this can be fixed?