It sounds like more of a hardware issue than a firmware issue.
I would recommend having your unit serviced, particularly if you're still under warranty.
Dont do it (!) - causes random power cycling on my television. No way to revert back to the 1013 firmware that's on their website, I tried the usb update option but it appears to not allow "downgrades".
Trying samsung support, so far meaningless feedback - I bet someone messed up big time. Hopefully they will fix it soon...