After unsuccessful upgrade of Gnome3 packages in new Precise Pangolin 64-bit environment I get this error at installing gnome-shell-extensions-user-theme package:

The following packages have unmet dependencies:

 gnome-shell-extensions : Conflicts: gnome-shell-extensions-user-theme

 but 3.2.0-2~webupd8~oneiric is to be installed

E: Unable to correct problems, you have held broken packages.

I tried to remove by running sudo apt-get purge gnome-shell-extensions-user-theme but get this:

Package gnome-shell-extensions-user-theme is not installed, so not removed

My Gnome Classic profile works well but Gnome3 session can't run.

How to resolve this error?