I have a couple of older iTouch DS flashcarts in use with DS Lites. I have the latest (last?) software 3.9a. The issue I am having only occurs with 4GB MicroSD's.... the smaller sizes always work. Basically with the 4GB MicroSD, when I turn on the unit, I get a black screen about 75% of the time. If I cycle the power, i will eventually see the yellow "Loading..." menu and it will work. Is there any way to make the 4GB as reliable as the smaller 512Mb and 1GB MicroSD's that I have tried? The one difference I can see is that the 4GB is formatted using FAT32... could that make a difference? Can I use FAT on that big of a card?