Because of regular crashes when reading certain emails (Hello Paula! :-), I compiled mutt 1.5.5 under Mac OS X 10.3.1, since fink doesn't yet provide anything more recent than mutt 1.4. Before I started using fink, I compiled mutt (1.3.28 IIRC) for OSX by myself, which was always quite tricky, and never went smoothly without any tinkering with the source. Anyway, mutt 1.5.5 compiled out of the box, without any changes, which is really fine.