Looking at the import after using ImpEx, the polls look correct in vB. When I import to XF, the poll results are lumped into the first choice in the poll, and the number of "votes" (which aren't really votes, of course) does not add up to the actual votes. For example, one recent poll has 22 total voters, with votes across all options, where the XF import shows 104 votes for the first poll item, with the rest being zero. I did not vote in the poll, and yet I see poll results when I visit the thread (meaning, I can't vote on it). Looking in the database tables, I can see where the first choice got all the votes, and a list of user IDs of who voted, so the results in the forum match what I'm seeing in the database tables.
Have I missed a step in the import, or should we move this over to the bug report area? I can send a URL to the forums privately if needed.