What I've been known to bitch about is the user interface. Two big things: 1: Colour choices and font sizes seem poor for making the display readable, and there doesn't seem to be any was of adjusting them. 2: Some elements are Standard Windows. Some are CL-style. And some CL-style material could be Standard Windows. I'm not going to claim the Windows UI is perfect, but Microsoft did a lot of work on how it works, and how people use it. Apple have done the same for theirs. For the standard jobs, it makes sense to use standard OS methods. For other stuff (look at how the lights can be moved), there isn't a Windows standard. I wonder if some of the bugs come from people trying to do ordinary stuff in a new way, and making their job more complicated than it needs to be.