Yeah, something like that. This is exactly what happened: 1. I plugged in GO2A SE, proceeded to turn on DFU app and clicked on "Start" 2. It stalled indefinitely at "starting upgrade" so... I clicked "Canceled" and unplugged GO2A SE 3. Did step 1 again. GO2A SE still identified as 2.00 at this point. 4. Upgrade failed "WRITE ERROR!" (can't remember the rest of the error) 5. Unplugged GO2A SE and plugged it back in: firmware 1.5 So... that's that. I have a GO2A SE on 1.5 now. It's basically perfect ergonomically, and I can also force high gain, finally. HD800 loves high gain. My GO2A Infinity will probably remain as a backup for the next long while.