OS: Mandrake Linux 9.1 (But could affect any system).
Browsers sometimes fails with the error message
Error - Content Type header missing
When trying to send post data to Webmin (minserv.pl)
It appears to be related to that fact the newer perl
versions do character set encoding on standard
input/output and file IO.
Adding the following lines to the start of minserv.pl
fixes the problem.
eval "no encoding";
This disables perls ability to do character set