I got really frustrated with this last night; so much so that I considered changing back to my previous router. Apart from the issues already noted, I found I couldn't get one of my USB flash drives to work, even by swapping from the Kingston device to a Sandisk flash drive. Then, some time later, I rebooted the router and the flash drive that hadn't been working, started working, but the other one stopped working! Eventually, after much messing around, I ended up in a situation where neither USB device was recognised. So I decided as a last attempt, to try the stock firmware. To my surprise, everything started working again, including the two flash drives and all without having to reset anything. So for now, I'm going to stick with the ASUS firmware while I consider my options. Incidentally, in case you are wondering, this is the procedure I followed when installing the Merlin Firmware: 1) Updated firmware; 2) Performed a factory reset, including initialising all the settings; 3) Set-up router from scratch.