OK, so i've searched through the old posts but still nothing... My friend has iChat 3.0 (he's using Tiger). PowerMac G5... Just bought an iSight. iSight is showing up in iChat (the green icon) and also in the system profiler - so no connection problems. However, when either of us tries to video message each other, he receives a message saying "iChat camera is in use by another application". Yet the only thing he has open is iChat. We've tried everything... repairing permissions, checking the firewall (it's off)... the strange thing is we can audio chat using the mic on the iSight. Just no video. Anyone have any thoughts?