Yes, on my board I have cases, where, when I hit the bulb to markread an individual board, All messages are set as NEW (on all boards!) instead.
Could be that something's wrong with my hack implementation (and language file inclusion), and not with your original code. - That's why I am wondering whether anybody else experienced this with the hack too.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.