Got another problem: After some time I get at the top of webGui pages 
this error:
Warning: filemtime(): Stat failed for /conf/config.xml (errno=2 - No 
such file or directory) in /etc/inc/config.inc on line 126

Sometimes also php pages open for saving ... I have to go back and hit 
link couple times again to work.
Thats my second installation of m0n0wall on another hard drive - still 
the same errors.
I read that this is due to filesystem errors. Whats the problem ? How to 
fix it ?

Cheers,
Tom