I have just received my new iMac (24" 3.06GHz 2Gig) and so far I can say I am very pleased with what I see, but still there are two things bothering me at this moment: i) I noticed there is quite a lot of marks on the inside of the glass (which at first I cannot clean), one of them clearly resemble greasy fingers across the panel. You can only see this when the machine is turned off and you examine it close by (but yes, it does bother me somehow). What should I do, return the machine and ask for a replacement or clean it by myself (I have read about removing the glass panel in other threads and wonder if you guys think it is safe to perform this manouver). ii) How to run run speed tests on the machine? Sometimes I fell that it is not as fast as it should be for a 3.06GHz (programs slow to open...). Thanks for the inputs and regards!