I started getting an error message (4 times) that is new to me, never before have encountered it. I'm thinking it might have something to do with itunes, but not sure. It seems to have started since i've started using itunes recently. It says it's reported by TechTool which I have installed on the system for maintenance. I've posted a screen shot of the message. Is this something I should be concerned about? How concerned? It's happening on a G4/733. Any info would be great. Thanks!