popver plugin doesn't popover

I am trying to implement the popover plugin.
I was using wp 3.2.1 and had the popover working.
I upgraded to the new popover plugin 4.2 which was giving me an error in wp 3.2.1
Now I upgraded to wp 3.3.1 and tried to implement the popover.
Unfortunately the popover does not popover.
I am using wp 3.3.1 with blogmu and have mostly (if not all) wpmu plugins installed.
Any help to get the popover to popover will be appreciated.