silverstripe/silverstripe-forum — pull request #58 by wwillm (2014-01-15 19:36:46+00:00)
Title: Update ForumHolder.php

The filter depending on the "LastViewed" field does not work, it produces an empty condition, which is always True.

I could not find why, but I changed the code to do it with PHP.
This solution is not nice, but working.