Hi France,
The error doesn't always occur, but I'd be surprised if you didn't see it after 3 to 5 try.
For testing, I created a database with 500 documents (input appr. 80 MB) and another one with 20,000 documents (1 GB). Unfortunately (or maybe good for us?), I didn't manage to crash the WebDAV driver, using the latest snapshot (I didn't try any earlier version); maybe someone does?
Can you find some additional information on the error in the log files or on stderr?
Christian