WindowBlinds was a major improvement over the bland UI in XP so we put up with a lot of display anomalies and conflicts. However it really only offers variety over Vista’s Aero.
After installing WB6 in Vista64 there were the usual dozen or so apps that I had to tell WB6 to ignore to prevent problems. And what sucks with that in vista is some of these apps now use standard windows 98 UI, a huge step back. It would not let an anti-spam module from Eset load and completely erased the title bar in Thumbs plus 7, even after I set it to ignore TP7. Performance was much slower than aero with fly out menus taking 3 or 4 seconds to open compared to instantly in aero.
Even when WB 4 & 5 were mature apps I still had numerous ignored apps and display anomalies especially at 1600 x 1200 but it was so much better than XP so I put up with it. My tolerance for this is going to be much lower with Vista so SD has a lot of work to do to make WB6 worth it.