Random thread closures in N&IC ?

[benftl]

I'm noticing random thread closures with no explanation as to why they've been locked?

http://forums.overclockers.co.uk/showthread.php?t=18182092

http://forums.overclockers.co.uk/showthread.php?t=18181866

^ to name just two, and I've noticed it happening before.

Anyone able to shed some light on this?