My dashboard is completely broken - I only see its heading and the "Latest Activity"-heading and that's it. Everything else is not available! :(
OK, I can tell that it's plugin-related because if I disable some plugins (couldn't find out which one, but read on to get to know why), the dashboard works again.
If I re-enable *all* plugins, the dashboard is still shown (even then CTRL+SHIFT+R is pressed in Firefox to get the page directly and freshed from the webserver). Also when logging out and then in again, it's still visible.
But after some time, the dashboard gets hidden again.
So I'm asking for help on this and how to fix it! :)