Comment 8 for bug 630193

Hi,
Having a very similar, if not the same, issue with my Intuos 4 on Windows 7 64bit. Within the Unity app, left click/drag doesn't register. However, it does seem to work with GUI/2D elements.

Wacom driver version: 6.1.6-7

Example here:
www.vostopia.com

In the "your avatar" section, the stylus has no effect (with a mouse you can drag rotate the view around the avatar), however, the take picture button in the top right works when clicked upon.