Well, they aren't really issues, more just like minor (very minor) inconveniences. I've had a model M for a while now but haven't been able to use it due to the fact that I own a laptop which does not have a PS/2 port. I got a PS/2 to USB adapter in the mail today which I purchased from the geekhack temp store. The adapter mentioned is this:
http://www.idinnovations.com/usb%20adaptors.html Anyway, I attached it to my model m and plugged it into my USB port and it installed the firmware etc etc. The keyboard works fine and all the keys are functioning as they should be, but I noticed two things.
1. The indicator lights for Num Lock, Caps Lock, Scroll Lock are not lighting up. I know for a fact that they are working as they briefly light up when I plug the adapter in, but do simply turn off and do not respond at all to their respective keys being pressed.
2. I seem to be able to achieve 2KRO over USB. I don't know if this is due to the adapter used, or because that's just how model m's are.
Thoughts?