When I put my mbp on external monitor (Benq 24')
using minidispaly port to VGA adapter,
sometimes my monitor goes totaly black for like 2 seconds and then back on
I tried to asure if cable is conected properly or screensaver properly set,
but it is still hapening.

I have also Windows XP installed and I dont have this problem there.
Anyone knows what is wrong? Do you thing it might be problem of latest OSX update?
Thanks for any help

My config:
New MBP 2,8Ghz 4Gb ram 320RPM HDD,
latest OSX update 10.5.6