I've daily-ed my RF87u with BKE redux heavies for ~6 months now (and that translates to probably around 10 hours a day at my desk). I recently noticed that my backspace key is "sticking" (it takes some fraction of a second to pop back up after I release it).
I'll probably pull it apart tonight and swap the dome with a less used key to see if that fixes it. Has anyone run into anything similar before?