I've got a Logitech 9000 WebCam and in both Tiger and Leopard while watching the camera's output in something like Yahoo Messenger or IChat, I see a 'glitch' (like a tearing of the picture or corruption of it) go across the bottom third and sometimes the entire picture once in awhile. Sometimes it's like once a minute and other times once every 10 seconds or so. It DOES show up on the receiving end of the broadcast as well. The camera does not produce any such glitches on my PC when I use it there, just on my PowerMac. Basically, I'm wondering if this is a problem with MacOSX's UVC driver OR if it's a problem with my specific Mac (i.e. a 1.8GHz 7448 G4 upgraded PowerMac using an Ultra USB 2.0 PCI card). Does anyone else using this camera on a Mac see something similar? If not, I would guess maybe the Ultra USB card isn't quite right. I had some trouble transferring images from my Canon A590 digital camera via the USB cable the first time I tried it. After trying it on the USB 1.x connection, it worked fine, but slow, but then when I tried it on the 2.0 one again, it worked fine and fast, so once again, I don't know if the card works 100% correctly or not. USB Memory sticks transfer files fine, etc. and a slide/negative scanner worked OK when I used it for a month. USB PCI cards are cheap so I could always try another brand if that turns out to be the suspect.