Namely, my M and my Cherry G80. It occurs between words, never in the middle.
The active converter from PS/2 to USB is one obvious common element. The issue does not occur with a modern USB keyboard. However, I don't recall it happening on any of my old Dells through the same converter, and
sSome of the Dells are older than the Cherry (some even have the old grey plug). Haven't been able to verify whether this happens via PS/2 without the converter. I might--the Cherry probably won't hang my computer the way M does, since I won't be replugging the M in any time soon.
Anybody else ever witness a similar thing?