Hello all! This is my first time here and I am hoping that I can get an answer to my question. I have a G4 Powerbook and when I play movies in iTunes, the playback is absolutely sluggish. I have the same problem when playing video online. What could my problem be? Specs: 15" G4 Powerbook 1 GHz PPC 2 GB DDR SDRAM OS X 10.4.11 Thanks in advance!