Delicious imports

Twice now, I've tried to import my bookmarks from firefox and been left with an "importing...." screen for hours and zilch bookmarks imported. I doubt its the amount of bookmarks - as I have at most a meagre 40. So that's very much determining my feelings towards the site. As Anonymous Librarian has pointed out, the site is clunky. So while I agree that the idea is good, I'm finding it's not very usable. Has anyone else had trouble importing their bookmarks? Surely we shouldn't have to import one by one?! Sigh...