You wanted the best, you got... Out of Context Quote of the Week.
"If I was doing the Mann Act with two chicks, there'd be multiple violations." (JustinShapiro)
I'm using Firefox 18.104.22.168 on my laptop, and for some reason, I'm prone to clicking on links right after hitting Alt-Tab, thereby Alt-clicking. Which, I'm sure we all know, immediately downloads the link. Since that keeps saving pages that I just want to look at, I'd rather just disable it because I don't plan on using that shortcut. But I can't figure out any way to do that, and Google's no help. Any ideas? The extensions I have installed are Adblock Plus, Adblock Plus Filter Uploader, Download Helper, Greasemonkey, and Talkback.
I know this is a simple and stupid thought, and you did say there didn't seem to be anything wrong connection-wise, but when you checked the connections, did you check the drive cable at the motherboard?