Great move to switch over to Bootstrap. I hope this will help you reduce development time by focussing on the important stuff in the backend. And thus help you correct some of the older bugs (like the broken "number of files" feature for TV series).
Can't wait to see new features as well, like an "re-upload a subtitle" function in case one has found some errors in a subtitle file that has been uploaded already without losing all the ratings and comments etc.
In any case, thanks for maintaining this platform. It's my favorite.