User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:184.108.40.206) Gecko/20060111 Firefox/220.127.116.11 Build Identifier: Thunderbird 1.5 Setting a message filter on a news account does not filter incoming messages. Reproducible: Always Steps to Reproduce: 1. Click News Account Folder 2. Click Tools > Message Filters 3. Add a New Filter 4. Save Filter, Close Dialog 5. Click on Newsgroup Folder Actual Results: Message filter does not filter incoming messages after its creation. Run Filters on Folder option is disabled. Expected Results: Message filter should filter incoming messages. Run Filters on Folder option should be available.
Reinstalled Thunderbird 1.5, and the problem has gone away.