My attempt at creating a poll did nothing. I clicked 'create poll', selected my testing journal interalia, made a fake poll, clicked preview, then clicked post poll. That took me back to the create entries page, which was blank. I checked the journal and nothing was posted.

Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-GB; rv:1.9.2.23) Gecko/20110920 Firefox/3.6.23

ETA: same with Safari 5.1.1