First of all sorry in advance for my bad english... I plan on buying an Imac no later than april. I'm currently waiting for the next upgrade hoping for a 3600 hd option. Will be getting a 24". My question Im sure i will find it really stupid in some months, but after 2 20-30 minutes try with mac in store, i cant seem to understand how the windows changing and fading thing work. I hope someone understand what i mean... When i am using iphoto for example, it always change windows to another one by accident or something. Is it a mouse button i've hit each time or OS thing that i will be used too after a full day? Really stupid question I know but its the only thing that buged me the 2 times i tried this superb machine lol. Thanks for answer!