That icon usually means that the reader has gotten stuck opening some file.. as already suggested a soft reset will usually cure it... if not, it may indicate a malformed epub in which case you should plug it in via usb and delete the last few books added.. I used to get that when I got impatient at the sluggish response of the touch screen and kept tapping the thing lol... seemed to jam the thing up... I have found that if I re-cycle the power on the t1 after a charge it seems to help to keep the device healthy
