Thank you for your bug-report, Monkey!
It will be reviewed as soon as possible by our Developers.
Afaik, you can add a poll for a while after the thread's creation or till the thread faces a certain number posts
ok, can be closed if that is the case
it's still something that needs to be looked into though, wouldn't hurt to have it always enabled.
Bumped the maximum time after posting before polls are disabled from 9 hours to 96 hours (4 days).
Closed.