Nothing, I still have it and it still functioned last time I used it, but I decided I wanted to try out a few wireless keyboards.

However, my last two systems have had issues with Bluetooth. I thought it was a hardware issue (my previous desktop went through a few storms), but since the problem has persisted between two desktops, it seems like a Fedora problem. My laptop also runs Fedora, though, and has no Bluetooth issues (though I haven't tried with these keyboards). Maybe it's a problem with a particular adapter that both desktops happened to use.