Hi - 2 of my keys aren't working "F4" and "five". I've run disk utility, no problems. I've plugged in an external keyboard and that works fine. Any ideas what the problem might be? I will never buy one of these again - first video card went after 18 months (i was stupid enough not have Applecare) and it cost £800 to replace. Second battery bulge, so now we just plug it in and now the bloody keyboard! Aargh!