Where did my middle click go?

I recently changed my mouse here at work, and all of a sudden my middle click stopped working in Firefox (well, it stopped working everywhere, but that's where I noticed it). I decided to Google for this problem to see if I could find out what was going on. Whenever I middle clicked it seemed to simulate an Alt-Tab.

I found a few hits, which indicated to me that it's a fairly common problem. Just in case anyone is experiencing a similar issue, the solution follows.

Basically for whatever reason your mouse wheel isn't being treated as the standard "Button 3". You can fix this by going to Control Panel, Mouse. My mouse wheel was mapped to "Next window", thus the Alt-Tab behaviour. I selected "Middle-click" and hey presto, problem solved!

I just wanted to write this quick update to help anyone who may have the same problem. Hell, if you happen by this post BEFORE you have the problem, you can now avoid it altogether!