Windows manager loses track of Skype

If you close the last Skype window (e.g. contacts list) the windows manager seems to consider the process terminated, and the white triangle disappears from the taskbar. However, the 'skype' process is still running in the background but there is no way to reach it through the window manager. If you try to launch Skype again from f.e. the task bar a new process is started but it is not possible to log in to the same account since the old process is still active with that account.

If you happen to recieve a skype instant message it is possible to resume operation of the application, but the only other option is to kill it manually and restart.

Up to date Ubuntu 12.4 system.

libbamf0 version 0.2.118-0ubuntu0.1
skype version 2.2.0.35