Incorrect combobox drawing within toolbars under Windows 2000 is known problem, but unfortunately with this release it becomes somehow more annoying:
screenshot (CodeCompletion toolbar is heavily affected). You may add this one to "Regressions/
Confirmed/Annoying/Common bugs" list if you feel it feasible.
There is also some quite funny bug with Symbols browser when you turn on "Show inherited members". If there is a class (say ClassA) that has some inheritance relation with other class (ClassB), then it's possible to expand tokens like this: ClassA->Base classes->ClassB->Derived classes->ClassA->Base classes->ClassB->Derived classes->ClassA... etc up to infinity. This one is not platform specific though.