It's still not working for me either but I'm getting used to Folk tab, that I've linked above. It does some things that mandolintab.net
doesn't, such as converting abc's to guitar tab and the tab seems to be more usable with note values included. It also seems to have the capacity for converting them to banjo tunings and DADGAD guitar though I haven't checked out those particular functions yet. Of course it does standard notation as well.