[newbie] /var/run/postmaster.pid

[root]

Everytime Bar once that i have ever installed Linux Mandrake v7 i have
had an error report when i try and save any LinuxConf changes done in
KDE. It says:
    "invalid /var/run/postmaster,pid file"
This  is actually really annoying and was wanting to know if anyoine
coiuld help.
Idea's appreciated.

- John