Kind of. I think it was something to do with the USB cable as I tried another and it stopped dropping to romdump mode.
Still not 100% convinced though, as I was getting a lot of other weird stuff. Main one was that the stock launcher was constantly force closing. Ended up installing ADW Launcher EX and now the device is rock solid again.
The only other thing I didn't try was wiping to factory settings, though I did wipe the caches.
Current Devices: Samsung Galaxy Note II (N7100), Acer Iconia Tab A511
Past Devices (too many to list, mostly Acers!)