Comment 10 for bug 630193

I installed natty by upgrading from 10.10, and having this issue.
I also thought that thigh might be sensitivity issue because Wacom pen cannot click without a few pixel dragging.
I can sometimes click a button though most of the times cannot. This is a common problem for wacom tablets; Docky also has this problem. But gnome-panel and other gnome-buttons work perfectly.