It's a known problem. see http://bugzilla.mozilla.org/show_bug.cgi?id=114952
-Seth David A. Cobb wrote: > FIRST OFF: I love it! Eudora had spoiled me this way. > HOWEVER: > The announcement of Mozilla Release 0.97 says the labels feature > is "fully implemented." I am using "Mozilla/5.0 (Windows; U; Win98; > en-US; rv:0.9.7+) Gecko/20011221" and the stand-alone message window > has Menu.Message->Labels... all label choices greyed/disabled. This > is not logical! It should me very similar to Message->Mark->Flag, for > example. > > Bug? If so, Filed? If not, I will.
