"Hide Topics I've Read" Filter doesn't work?

Changing the Topic Filter to "Hide Topics I've Read" doesn't seem to have any effect? Neither does the "Mark All Read" button?
[128 byte] By [FrankBoyne] at [2008-2-25]
# 1
This is a known bug and the forums team is working on implementing this functionality. Sorry it took so long to get back to you--somehow your question got buried.
JoeMorel-MSFT at 2007-9-8 > top of Msdn Tech,Feedback for forums and MSDN websites,Bug Reports for Forums website...