Acer's decision to delay the Iconia Tab A100 may have come from learning a hard lesson from Apple, sources hinted Wednesday. The tablet was moving from its June target to either August or September as Acer had discovered that Android 3, an OS designed primarily for 10-inch tablets, wasn't working properly on a seven-inch design. With many apps not working properly, Acer was waiting in the hopes Google will have solved the problems later, Digitimes heard.