KMail : Index 0 out of range

[Michael Naumann <michael.n@strux.net>]

I'm using KMail (1.3.2) on a woody-box and it works perfectly.
Except for one minor flaw: Each time i jump to a new message,
either via <SPACE>, +, Cursor or Mouse,
I get a new entry in .xsession-errors, saying:
QMenuData::removeItem: Index 0 out of range

What is causing this?
Should I be concerned?
How can I avoid this?

Thanx, Michael