I am using Gnome 3 with Ubuntu 11.04 but I have a strange problem that happened after some updates. I can change the Gnome GTK theme but I am not able to change the Gnome Shell theme and my titlebar is at least annoying.
If I change theme it just changes the title background color from blue to orange etc.
In addition in Shell Theme it does not allowing me to choose a theme. It says something about extensions but if I choose "Shell extensions" that displays an empty page withnno configuration.