Description of problem:
This is reporting for sent unsent mails in queue.Details are in steps.

Version-Release number of selected component (if applicable):
Thunderbird-1.5.0.12-17.el4 - x86_64 (ja_JP)
Thunderbird-1.5.0.12-17.el4 - ppc (zh_TW)

How reproducible:
Always.

Steps to Reproduce:
1.create a new correct message,and select "File"->"send later"
2.create a new message with wrong address,and select "File"->"send later"
3.create a new correct message,and select "File"->"send later"
4.click "Unsent" folder in "Local Folders"(The purpose is switching view window to Unsent folder so that you can see the sending process. )
5.select "File"->"Send Unsent Message".

Actual results:
The messages were sent by queue.When there exists a error messages,it won't continue send messages behind it in the queue.

Expected results:
Thunderbird should skip the error messages,and continue send the other messages.  

Additional info:
Thunderbird 2.0 can complete just like expected results.
I tested it in my local machine x86_64 and stable machine ppc(ppcp-4as-7-v1.lab.bos.redhat.com).