Powerbook G4 (2005) Exhaust Grille Q.

Hi there I noticed that when looking down on the powerbook from above that the exhaust grille has 2 like slightly raised bumps near the centre, Is this normal? they are symmetrical.. but still look a bit wierd



cheers



I should note it has 128MB 9700 in it... (im thinking this is the reason it has the bumps)