I found a problem with multiget in Linux mint 12. It opened as a blank window, I'm not able to do anything in the desktop.
I will second that bug report.
Under Gnome Shell the application takes up the full screen & nothing is rendered in the window. It works fine if a non-Gnome Shell desktop (e.g. LXDE) is used.
It's logged as a bug: Artifact ID: 3477093.
TIAGO LAGE PAYNE DE PADUA
the workaround is to press alt and drag the blank screen, then you will see the multiget window under it.
Thanks tiagolpadua. The next step is to right-click the Multiget system tray icon and uncheck the 'Show Drop Window' option. I then chose File menu -> save Config. Now when I start Multiget there is no problem.