I have been usign the latest SDFat beta quite successfully with a 256MB San Disk SD card. I just tried a 2GB card, also a blue San Disk.
When I run the bench application, i getL
Type any character to start
Free RAM: 14998
Type is FAT16
File size 5MB
Starting write test. Please wait up to a minute
I wait and wait, over 5 minutes, and finally remove the card, and i get:
error: write failed
SD errorCode: 0X15
During all this, my L LED is lit steady. The card has a file called bench.dat that is 0 bytes long.