rpm version 4.4.2-6 on a fc4 system with some packages upgraded from rawhide.
will fail with:
invalid type 20 in mconvert()
(this breaks rpmbuild, that's how I got to it).
I was able to work around the problem by copying /usr/lib/rpm/magic.mgc from a
box running rpm-4.4.1-21
Caveat emptor: I may be missing some other packages rpm requires, so this may be
a NOTABUG, I didn't have the chance to test it on a real rawhide box.
Seems to work fine here on rawhide
/etc/passwd: ASCII text