I used sh404SEF together with Fireboard and noticed the pagination-links for threads with more then one page gave some unexpected results. The url would be something like:
www.domain.nl/what-the-bliep-do-we-know-page-2
and it seems fireboard interpreted the 2 as the startoff point of the second page. so some posts are on the 2 pages. also the pagination-navigation was not selected (you click op "3" for page 3 and "1" for page one is still selected).
I had a client complane about that, so I made sure sh404SEF does not work with Fireboard anymore. Thats why I can't just post the url, in case you were wondering.
Not sure I posted in the right category, but then you guys are so confident about your product you didn't even bother to make a category called 'bugs'.

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FireBoard 1.0.4 Stable
sh404SEF Version_1.3.4 - build_288
joomla 1.0.15