Bug with 6.5.1 unread marks?

Is anyone else having problems with 6.5.1 unread marks ? If I open a message, read it and then close it, everything works okay. then if I open it again and reply or forward, it gets set back to unread ?

Subject: File, Database, Properties. Fourth Tab, Select Do not mark modified documents as unread.

Subject: Bug with 6.5.1 unread marks ?

works as designed …

have a look on technote 1153709