I do not want to sound rude - so first let me congratulate to the fresh IDEA 5.0 ;)
... but: Am I the only one who thinks the UI is a partially a little bit uglyish / or at least somehow space-wasting?
e.g. see idea.jpg: I do not like the big border around the textfield inside the combobox.
see idea2.jpg: why the big borders everywhere?
I'm quite sure you know the style guide from JGoodies about redundant borders etc.
... could be improved, IMHO