When I change the "Enable Similar Threads" option under my Preferences it seems that none of the option is working.
I've tried " No selection", "Yes" and "No" but I always see the "Similar threads" at the bottom of a tread page.
Thanks! That option is one of the old custom VB settings. I'm going to remove them today, as they obviously don't work anymore.
The similar threads you're seeying right now are part of the new system, and always visible.