Hi all,
First I just want to say hello! I've been lurking these forums for quite some time as my Logitech G11 (the G is for garbage) started crapping out. After reading the abundance of information available here, I decided to go for the Filco Majestouch with Cherry brown switches, with NKRO. It arrived today and after a few hours of typing on this thing (I'm knee-deep in thesis writing), I'm in love. The feel is so much better than any keyboard I've used before.
Anyway, introductions aside, for the first time today I had a weird issue while browsing a webpage, where I clicked a link and the new page scrolled rapidly to the bottom of the page. When I went back to the other page, it, too, was scrolling rapidly to the bottom. Every page, every window... And no idea why. After about a minute it stopped on it's own, but now I'm wondering wtf caused it to happen.
I'm not at all sure it has anything to do with the keyboard, but since this keyboard is the only change to my system, I have to consider it. Has anyone heard of any issues like this? It could also be my mouse (very old Razer diamondback), but I've never had any issues like that before with it.
I think what might help my diagnosis is if someone could direct me to a program that monitors the input to my computer, and shows me what's being pressed. Does anything like this exist?
Sorry for the wall of text (I honestly can't help enjoying typing more than I have to on this new keyboard). Thanks in advance for any help you can give!
Cheers.

Edit: I should mention that I've hacked my registry so that "Page Up" and "Page Down" control volume (I never use them anyway), and "End" mutes volume. Therefore, if PageDown was stuck in some way (which probably wouldn't happen since these switches all feel awesomely springy), it wouldn't have any effects on my page scrolling. Thanks again!