window manager running already

[Frank Schaefer]

Updating to 1.5.9-1 causes problem under WinXP and Win98 when trying to
'startx:'

"window manager already running"

while none is actually running. I was not able to figure out how
'X' comes to this conclusion.  Is there a file that can be deleted.
The only other reason I could think of is that we started an
'X -broadcast' session. However, this too has been terminated. 

Thanks for any help.

Frank