Thanks -- yes, I've now enabled archiving. but I think you lose the folder structure when you do that. At any rate, I'm doing it. I received a message saying that this issue is sort of a Y2K problem for email: Most programmers recognize several significant numbers - 32768 is the number where the high order bit goes on in a 16-bit signed number, and 2147483648 is where the high order bit goes on on a 32-bit signed number. Now 2147483648 and 2 gigabytes bear a striking similarity - in fact equality. What hit you was a 32-bit signed number limitation buried in the code. And no, this won't be fixed by 64-bit operating systems because this number is locked into the structures of an on-disk file system. (This same problem is going to start hitting people who use USB memory sticks bigger than 2gig (or 4gig, I forget which) unless they format them with a modern file system.) This should shake loose some memories of Y2K. But there is a real 32-bit Y2K out there, and relatively few people care - it is when the almost universally used time format, a 32-bit number of seconds since January 1, 1970 GMT reaches its maximum value. That happens sometime in year 2038. That promises to be the real Y2K event - http://en.wikipedia.org/wiki/Year_2038_problem.