Read threads still highlighted

[Ryan_m_b]

I noticed over the last few days when I go to my PF or onto a forum and read a thread upon returning the thread is still highlighted (name in bold) to indicate it hasn't been read. It seems to happen most of the time now.

 

[Fredrik]

It's been like that for years I think. I asked about it last year, but didn't get any useful responses.

www.physicsforums.com/showthread.php?t=585244

 

[Jimmy]

I've noticed this problem from time to time. The only solution that has worked for me is clearing cookies for this site.

 

[mfb]

Opening the same thread again can help. I had this problem frequently some months ago, but it is nearly gone now.

It is possible to use the forum database to store which threads are read - this has the advantage that it is really accurate (and unread threads are still marked as unread if you return to the forum with a new session), but that could influence the server performance.

 

[Ryan_m_b]

Thanks all. I logged out and cleared cookies and it seems to have worked for now.

 

[Ryan_m_b]

After a few minutes problem is back again.

 

[Jimmy]

For me, the problem usually returns after a few weeks. I've never seen it return so quickly after clearing cookies.

 

[Fredrik]

I tried it too. When I came back here, no threads were marked as unread (not even this one, which had posts I hadn't read), so I can't really test it now. I guess I'll see what happens later.

Edit: I don't think the problem was ever gone for me, but if it was, it's definitely back now.