Before the updating everything was working perfect.
My OS is LMDE 64 bits (Gnome). I work with Awesome WM but every software came from Gnome. I am behind a proxy server. Usually I modify (globally) my proxy settings in Gnome-Control-Center. After the updating process I lost connection in Iceape, Pidgin, Dropbox... when I checked my settings in Gnome-Control-Center... everything was according to my original settings. For these reson I did not change nothing there.
So I modified software by software the proxy settings and right now I recover the connection in all of my programs but not in Thunderbird.
What can I do to resolve this issue?