None of the midis seem to be working. What's the problem?

If you're trying to download a midi and all you see is an empty white box or a broken "Q" logo, the Quicktime software/plugin is probably the culprit. For some reason, Quicktime has issues with newer versions of Internet Explorer, and even if you switch the file associations so that midis open with a program other than Quicktime, it still seems to wrest control of them. I was able to fix this by opening Windows Media Player after installing Quicktime, going to tools - options, clicking the formats tab, clicking the midi checkbox, and clicking apply. If the midi checkbox is already clicked, unclick it, click it again, and click apply. This made it so midis opened with Media Player. If this doesn't work for you, you can do one of two things: either uninstall Quicktime, or right-click on the link of the midi file you want and choose "Save Target As." Then, simply save it to your desktop, or to a folder of your choice and open it with the software you'd prefer to use.