Thread Descriptions

[RateU]

Do you have other custom thread fields applied to your forum?
If so, does it happen to the other custom thread fields too?

I can't reproduce it. I've tried installing MyBB 1.6.5, then create the Thread Descriptions (and some threads).
And I've tried installing MyBB 1.6.4, create the Thread Descriptions (and some threads), then upgrade to MyBB 1.6.5. Still, I can't reproduce it.