I just realized that all the polls made before merging vBulletin to MyBB weren't converted - I have the polls in the database, and it says that the polls were converted in the MyBB database, yet on threads that used to have a poll, they don't exist. Any way to fix this?
MyBB needs to know that the thread we're looking at has a poll attached to it. It does this by having a column ("poll") in the threads table in the database. I'm guessing that this is all 0 - all the polls are there, but not attached to the threads.
Can you confirm this?
This was indeed the problem, Tomm! Thank you!