Recently upgraded from my trusty old G4 Mirror Door to a G5 Dual 2.7. Immediately noticed that the fans constantly pulsate when I do anything that requires any muscle InDesign, PhotoShop, etc. Web surfing she's as quiet as a mouse. Is this common or do I have a problem that can easily be fixed? Running 10.4.11 with 4 gig of ram and two brand new WD 640 gig hard drives.