Interesting, I would've assumed they (the keyboard/mouse part) were just USB switches. What's the (supposed; not in your case) benefit to them doing any HID-aware stuff? No Windows 'device connected' bongs when you switch (because it's always identifying as the KVM, just not sending anything)? Anything else?
EDID emulation is great when you have multiple screens, and wish to prevent MS from randomly scattering your Windows all across your other screens every time you click to another input.
