I have a 2B1 and a 2B3 board. I can confirm 2B1 recognizes the 2GB, but I get random crashes. I cannot get the 2B3 recognize 2GB at all. The two boards seem to be picky about RAM modules in different ways...

Also, for the 2B1 board I stuck to the age old 2004 firmware, because the magical latest update - although I do have access to it - it caused various stability issues with it, so I went back, and now all seems well.