Hello, I'm new to Macs, this is my first one, I recently bought one not to long ago, I love it, it's fast, but one problem, it lags a lot whenever I watch Youtube videos or anything that uses the flash player, my Power mac is running on Mac OS X Version 10.5.8. Processor 867 MHz PowerPC G4 2 MB L3 cache. Memory 1.5 GB SDRAM. Startup Disk HD. So can anyone help, or give me an advice on what to do? Thank you..