It appears that mediafire is inspecting the archives uploaded to their service and disabling downloads, offering a link to Amazon in its place. Only a few are affected so far, but I can imagine this spreading like a disease among the other links. If any you're trying to get have been affected, let me know and I'll get it online for you again. In the meantime I may have to redo this collection and others with password-protected files. I really abhor using passwords in archives, it's always a hassle for everyone involved, but if it keeps prying eyes away from the contents of the archives it'll just have to be done. It was a bit of a chore getting them up in the first place so this won't be immediate, but hopefully we can keep these files online one way or another!