Just putting this out there in case anyone has any ideas.
I have an older Wacom Intous2 and it still works great. I'm on Windows7. On Blender 2.71 and earlier, my wacom tablet always worked perfectly, and I used it all the time for sculpting and texture painting. It worked fine in every part of Blender, though.
After 2.71, My wacom no longer works. At least, not entirely. I can grab objects and move them with it, I can position the 3d cursor, but I can't orbit and zoom in the viewport. I'm currently using Blender 2.73a build from Feb 4.
I still keep 2.71 around for sculpting and painting, and it still works fine in there. So I don't think it's the wacom drivers or any changes in Windows. My wacom's behavior hasn't changed in any other program, only Blender, and only on versions after 2.71.
Any ideas on what I can do to bring back full functionality?