[orca-list] strange behavior in thunderbird

[jose vilmar estacio de souza <vilmar informal com br>]

Hi all.
Try the following:

1. Open thunderbird and sent to yourself 5 messages with following subjects:
test 1
test 2
test 3
test 4
test 5
The body of the message can be empty.

2. After you receive the 5 messages  delete the message with the subject
test 2.

When I do this, the test 3, test 4 and test 5 subjects are announced in
the message list as test 3.
Can anyone confirm?
Thanks.