Well, aren't I forgetfull? I completely forgot to mention that my first unit, the A70-KL1, DID have the top cover fiz/replacement (and with a SHABBY piece at that!) - yet the problem persisted. The same evening, after about 15 minutes of use, and the problem was back.
Anyways, I don't remember if it was mentioned, but the phone number for Toshiba Canada's Technical Service and Support is 1-800-663-0378 (funny, I have it memorized now). I JUST got off the phone with them and was offered a Service Request number, which I refused. I told them MY only option was for an RA number (Return Authorization). They will have one of their representatives call me back next week sometime.
For what it's worth, I also inquired about the M and P lines (M30, P30 etc) and whether or not they were experiencing a problem with them. I was told that they have not had any and that those lines are unaffected. I guess i'll find out soon enough when I get my call and upgrade... AGAIN!
Isn't technology just a wonderful thing?!?!??!?!?!
(did I say that already?)