Notice that Slic3r has been giving you some funky directions on bridges? (and by funky directions, I mean getting them completely wrong?) – There was a commit 3 days ago that should fix at least some instances.
Living on the cutting edge is fun.
If you’re on Arch Linux, there’s a slic3r-git on the AUR that you can use a builder on that’ll keep you always up-to-date. (yaourt, packer, etc) – Otherwise I believe either the Slic3r.org site or the github site have instructions on running from the github repo.