I have a simmilar issue... I have a high-gravity ale that has been in the secondary 3.5 wks now - after 1-2 wks in the primary. It hasn't fermented vigorously since the primary, but continues to ever-so-slowly release a small peppering of very tiny bubbles. It had high initial gravity, and I used a bit of yeast nutrient, so that is probably supporting this very long ferment.
I know the best option is probably just to be patient (relax, don't worry, etc... *L*) and let it keep going, but I am tempted just to keg it already. I need the carboy for a batch of stout sitting in my plastic primary.
Guess we'll see.
BTW... did you move your carboy in anticipation of bottling? I've heard of ferentation re-starting due to some agitation.