* wl-folder.el (wl-folder-sync-entity): Fixed problem when the

folder is sticky.
(wl-folder-mark-as-read-all-entity): Ditto.
(wl-folder-prefetch-entity): Ditto.

* elmo-pop3.el (elmo-pop3-process-filter): Check whether the pop3
process	buffer lives or not.

* elmo-dop.el (elmo-dop-queue-flush): Don't append to the dop-queue
while flushing queues (It causes infinite loop).