I ran into this with an AS/400 client and what it seemed was that when the
API went to transfer the data to the server it allocated the space in the
diskpool but since the AS/400 first builds a saveobject before it actually
sends the data (which compresses the data) it was larger that what was
allocated in the storagepool.  I was not able to prove this but from looking
at both the actlog and the AS/400 messages that is what it appeared to be.