Note that some bugs and issues are already being taken care of. Please refer to this list before reporting a bug:


SectionIssue
Shared category In a shared category when you are not the owner, shortcuts assigned by another user will also work for you.
Shared category When moving a bookmark from a category to a synced category, there's no notification about the bookmark added.
UI When moving a category with subcategories from a page with Tree Categories to a page with Column categories it will not move the subcategories
Google results FavSync results window in Google might not appear, when Google is redirecting
Sign up If signing up regularly and then using Sign up with Facebook, it will create another account instead of merging with your existing one

Your bug is not on the list? Report it here.