I've recently done a fresh installation of Ubuntu 11.10 64-bit (not wubi).
I had no problems, until I installed the program "Maple 15". Once I open Maple, the Home-button at the bar to the left, acts like the "Maple-15"-button. Additionally, the usual "Maple 15"-button doesn't appear in the same bar.
While Maple 15 is opened, I can't use the home-button to open the home folder. Once I close Maple 15, I can use the home-button to open the home-folder. However, the home-button and the home-folder aren't "connected" anymore, so it just opens a new folder every time, instead of re-opening the already opened folder.
If I uninstall Maple 15, the problem is solved.
I did not have this problem on Wubi.
Thank you, Jesper