For me, the bug's root cause is that the screenlet(s) are looking for "gtk-close.png" which wasn't installed in 12.04 by default. I added "gnome-icon-theme-full" from the repositories, which includes gtk-close.png, and the issue has not come back.
For me, the bug's root cause is that the screenlet(s) are looking for "gtk-close.png" which wasn't installed in 12.04 by default. I added "gnome- icon-theme- full" from the repositories, which includes gtk-close.png, and the issue has not come back.