SMT and sles11sp2

Recently upgraded my SMT box from sles11sp1 to sles11sp2. All it’s
running is SMT, and now it regularly says the repositories I have
mirrored cannot be mirrored.

If I go through yast-SMT server configuration, they will be mirrorable
(is that a word?) for a while, but then they go back to not being
mirrored, usually within an hour or so.

During the update, it was detected that SMT was on this box, and I
thought things were updated accordingly.