Not reallly a problem but I 'd just like to know "why". For example I clean up my HD with the disc utility then reboot. My HD tells me I have 8.5GB of free space.... then over a period of 2 or 3 days the free space goes down to 8.2.... 8..... 7.6 ECT? This is with all the App's closed and I have'nt downloaded anything. What's the answer please.