Netscape 4.61 mail on OS/2 works.

Thunderbird on OS/2 works.

Evolution 1.4 on Mandrake works.

None of the other Windoze machines that are using Mozilla or Netscape 6.0 mail are having a problem.

This is god-damned frustrating.....

Made zip archives of my mail, deleted PMMail, and did a new install. Still fucked.