my v2 8gb+8gb class6 card didnt have any problem, but the updater wouldnt actually install the update(never failed b4, not sure why it wouldnt work this time) so i did the manual update, really simple and “just works”
glad they where quick to handle your problem, be glad its sansa/sandisk not sony, last time i tried to get an rma on a sony product i spent 2 weeks fighting with them on a daily basis because they insisted it was impossible for what i was saying was happening to be happening…note, the problem got a firmware based fix 9 months later…didnt help me any tho 
like i said, be glad in this case its sansa, sansa and samsung have given me by far the best support of PMP devices in the last 4-5 years, MS and apple are at the bottem of the list with sony…blame the user=bs if you ask me 
