Heh. Nice. What caught my eye was apparently the layout change with the buttons on the sides, the improved support for mouse usage, the improved file requesters, and an UI that actually makes sense (to me)! The major drawback with the earlier (before 2.5a) versions was that the UI made me shudder and made it impossible for me to even /want/ to get to know it.. I am an esthetic person, ugly and confusing UI's are turn-offs (
Zmod is not ugly, but beautiful in its simplicity and clearity). I am sorry, but that is a fact for many others too. It seems as if the Blender team finally has understood this, and that makes me really happy..