Interesting...I definitely have never even so much as touched my memory settings, so I know it's not that. One thing I am very suspicious about is that I noticed that this problem seems to be happening after I've been running Tomato Torrent for a while (yeah, I know Tomato Torrent sucks...). So I left my system on again last night without Tomato Torrent running and it seemed to be fine. This certainly could be a network issue as you've mention since it does demand a lot of network activity. Right now I have a manually updated 10.5.2 based on Zeph's 10.5.1, but tonight I am going to try out his 10.5.2 DVD and see if that solves this issue (and other strange issues I've been having as well). Wish me luck And if you ever come across that thread, do let me know.