i found two GUI bugs which were introduced with beta29
first one is easy to find, the mouseover in the butterfly menu is gone.
https://vvvv.org/sites/default/files/imagecache/large/images/butterfly_mouseover.PNG
second is harder to see, select a node (dark grey) and now click on any other node and hold the mousebutton. the dark grey gets funky. i’ve seen this especially when moving nodes. looks broken.
https://vvvv.org/sites/default/files/imagecache/large/images/gui_drawingerror.jpg
this was tested on 3 different machines, windows 7 64bit, aero on and off