Description of problem:
After detach all attachments in a message, you will be prompted that "The following attachments have been successfully saved and will now be permanently deleted from this message:", click OK. Whereas after that, you could detach all attachments in this message again, the attachments are saved but haven't been detached successfully.

Version-Release number of selected component (if applicable):
thunderbird-1.5.0.12-16.el4

How reproducible:
Almost everytime fail, but sometimes succeed

Steps to Reproduce:
1. open a message with multiple attachments
2. right-click on attachment pane,choose "Detach All...", select a folder to finish detach
3. in the popup window "The following attachments have been successfully saved and will now be permanently deleted from this message:", click OK
4. try to "detach all" attachments in this message again
5. problem appear

Actual results:
Could detach all attachments several times

Expected results:
After detach all attachments the first time, User should could not detach all attachments again.

Additional info: