I just bought a ZT-180 off ebay (Christmas Gift resell). I flashed it to the Froyo 2.2 update from Zenithink. Everything was working fine. Played ANgry Birds last night for an hour or so and was playing around with the tablet for a couple of hours. Until this morning, I sideloaded (usb) a couple of apps (flash player, pdf read) from the zenithink site. That is when thinsg went south. After this the unit will now freeze at random times. I have flashed it back (using the menu not usb) to 1204. Then did a factory reset from teh settings menu. This seems to be a bit better, it will now boot but after about a minute or so the screen is unresponsive. You can not go back, anything other than a reset or pwr down does not work. Any suggestions? I am going to flash the unit via usb when I get home. Maybe there is something residual in memory that needs to be scrubbed?