Last night I gave up on the nLan adapter after I discovered that it doesn't handle local network shares properly. So I went back to my original Leopard installation with skgeosx/Marvell lan adapter. System has been up 14 hours now and slow jerky mouse is back. This time it's less intense, but I'm leaving my system on to see if it gets worse over time. Some notes: Last night when I left the system on, I forgot that Little Snitch was off, and I was running Transmission. Coincidentally, Transmission crashed only two hours after I fell asleep, so I didn't get a good test out of that. However, I re-opened it, and turned Little Snitch back on. After about 2-3 hours, the mouse jerking is happening. This is also what I was doing while it happened:

Safari 3.1 - I was aggressively browsing and downloading about 30 MP3 files ranging from 2MB-16MB in size.
Quicktime - I was sampling each of the MP3s I was downloading.
iChat - talking to one friend (about the MP3s, hehehe).
Transmission - as I already mentioned, downloading a 3GB file from approx. 20 peers and seeding at the same time to others.

As soon as I noticed the mouse jerking, I stopped Little Snitch to see if it would help. It either didn't help or the difference was very slight.

Now, as I check my console again, what do I see? Oh! The f**king mDNSresponder tick messages and a host of cs_invalid_page messages again! This has to be somehow related, and the only things that come up on google about these messages are related to hackintoshes or VERY rare "real" mac problems not related to our issues at all. Here's a text file of the console messages. Go through them if you'd like, and let me know if you get anything at all similar to this. Most importantly, I want to know what "lssave" is, and if it has anything to do with Little Snitch, because I am getting that particular cs_invalid_page message A LOT (as you'll see).

<a href="http://www.mediafire.com/?gyaimyb06ks">http://www.mediafire.com/?gyaimyb06ks</a>