Comment 1 for bug 204775

I'd like to add to my findings. I had tried turning off compiz, and even my nvidia-glx-new driver, and neither fixed the issue.

I found that the only resolution to fix this issue is to right click on the clock and go to preferences, and then set a location.

Once that was accomplished, the temperature and weather icon showed next to the clock, and now clicking on the clock does not cause lockups.

I hope this helps any others that have the same problem, I consider this to still be a bug though, due to the fact that this is an undesired action.