User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3) Gecko/20030312 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3) Gecko/20030312 Read news in "View -> Sort by -> Thread" and "View -> Messages -> Unread" mode. Read a child message in any thread, then collapse the thread and expand it again. The read message is no longer shown. You could argue that this is semantically correct, but it is not the expected behaviour. Messages should never be removed from display without the user leaving and re-entering the newsgroup. Reproducible: Always Steps to Reproduce: 1. Read connect to a news server and select a group with some threads. 2. Choose "View -> Sort by -> Thread". 3. Choose "View -> Messages -> Unread". 4. Read a child message in any thread. 5. Collapse the thread. 6. Expand the thread. Actual Results: Child message read in this session is gone. Expected Results: Child messages read in this session should remain, and display unhighlighted. Present in at least 1.2, 1.2.1 and 1.3, and probably earlier.

Confirming

This has been a problem since early Spring and still exists as of Build 20030513 Trunk 5...

This WFM. Messages newly marked as read stay unless I leave the folder. Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20060101 SeaMonkey/1.5a Also don't see Thunderbird equivalent Bug 248144 Mike do you see this problem using Seamonkey 1.0? However, an ancillary issue is "mark all read" does not mark the children of a collapsed thread as read. (Thunderbird Bug 321435)

Confirm WFM in Seamonkey 1.0.

mark WFM