Bo
Its never been stuck for me, and the time does always seem to be correct (it actually takes 5 days for a building that says to take 5 days) but i have seen jumps in the time where it adds a day, only to subtract it again hours later. Since the bug (so far) seemed to always fix itself in between i thought.. maybe it was my imagination.
I think it must be a bug. It looks all fine now and finished recently.