well I was having a really seriouse graphics problem where when i was walking or in cars the screen would go white foggy past localy relivent geometry (weapons, car geometry or HUD elements ect) sometimes it would clip in and out or artifact to a vanishing point in the distance.
I tried to restart the game but I ended up getting an error " could not create system surface memory" or sum such bs which lead me to the MaxMem work around however once i added that to the shortcut I got a new problem.
when i loaded the game I didnt even make it into an MP match, it would sit at the status bar of downloading content and a yellow chain apears over the dissconnect button.
I assume this means i lost connection but I tested it without the string (on the same server) and connected just fine short of the afore mentioned problem...
the webpage acidentialy submitted the thread before i was finished writting. now we have the complete though.
If you have a Ati Video card Get the 7.5 patch or 6.7 patch
And delete youre My Documents\ArmAArmA.cfg file and reload