Owner permissions suddenly set to -x, possible compromise?

[Richard Morse]

Hi!  I came in the morning and discovered that the file permissions on 
every cgi I have on my webserver had been set to u-x,go+x.  This seems 
to have changed at about 4:30a this morning.  I'm a bit worried by 
this, as I can't think of anything that would cause this, and there's 
nothing in any of the log files that would explain it.

Has anyone run into this before?  Can you direct me to a place I might 
find more information on it?  A quick google search on "owner cannot 
exec" didn't turn up anything...

Thanks,
Ricky