iMito just release a new stock firmware for their quad core series : iMito QX1.
1 add usb audio device support;
2 support bluetooth headphone now
Here is the firmware download link:
720P stock firmware:
1080P stock firmware:
The flash tools you might need is here:
Here is the screenshot after you made the upgrade:
PS: the developer on freaktab already fixed the video skip problem in imito qx1, and i think a perfect custom rom base on this rom will come soon.