My old Pro-Logic system is getting flaky and I may need to upgrade to a 5.1 system soon. But I have this recollection that several early PS2 games didn't support 5.1 sound. Specifically, if you configured the PS2 for digital and connected with an optical cable, you got no sound whatsoever. Is there a list somewhere of affected games? Are PS1 games running through the PS2 affected? Or can you overcome this problem by running a standard stereo cable to your receiver and internally switching the PS2 to non-digital for that session?