I just got my DSi and am awaiting my AceKard from DealExtreme. I notice that it won't let me into the DSi unless I perform the system update. Am I definitely safe to do that system upgrade or is there a risk the AceKard won't work? It looks likes from the other posts, there is a fix, but I want to be sure. Has anyone system upgraded? Any problems at all after? What else won't it let me do if I don't upgrade?