I'm trying to get fbwrite working on an Infocast 8". 
1. rebooted system
2. from the linux console entered: fbwrite --color=255,0,0 --pos=10,10 "hello"
3. dumped fb0 via http://infocast_ip/cgi-bin/custom/fb0

Result:
"hello" is displayed at line 10, col 10 in green as it is supposed to.
However, I get a second display of "hello" on line 10, col 68 which appears to be the second half of the screen.
Also, if I write past line 26 the screen scrolls up even though it is displaying characters only half way down the screen.

Anyone know what stupid error I'm making?