When I upgraded to Premium version, the drop-down select button (Posterboard, month, week, etc) stopped working. With the original installation, it was working and I could switch to different views.
My wordpress version is 3.5 and All in one Event Calendar version is 1.8.3. The theme at the site is Suffusion. I have buddypress installed.
I have a testdrive and you can view it online.