I was very excited about RubyMine and wanted to purchase it right up until the point that I saw this:
First off the main menu items are the wrong height as you can see when comparing with the native Gimp menu above. But more importantly it is almost impossible to tell which submenu items are disabled and which are enabled. Here's a hint: the ones with the uber-bright highlighted shortcuts are actually *disabled*. You can barely see that there's a shortcut for the enabled items. The difference between enabled and disabled labels is too small to see.