Disclaimer: Make sure that you don't reformat a drive with data on it if you want to keep the data.
Open /Applications/Utilities/Disk Utility. Click on the drive, (not the partition), and look in the bottom right corner to see what the Partition Map Scheme is. It should be Master Boot Record...
Sorry if this is the wrong place to send this. I didn't know where I should send it.
I found a reproducible crash when using Waninkoko's USB loader v1.5. I have no idea if the problem just applys to me, is in the loader, or the IOS. If I have the USB ethernet adapter setup and NOT plugged...