When one of our users sends a message with a large attachment, it appears that the message is not sent, i.e., it remains in the taskbar. She cannot close it or get rid of it, but the strange thing is, the message is sent. They do not appear in Outbox or Drafts, and she receives responses to them while they are still sitting in the taskbar (also still appear in Task Manager).

I have seen a post or 2 about this before, but there have not been any responses (post #s 65696 and 182974). Any new ideas?
Thanks