Several people asked me why post were being deleted from various boards (such as clan boards) when the moderator didn't delete the post. I didn't have an answer so I asked our forum guru (Netosia) and he said that various boards are set to auto-delete inactive threads at various intervals (15, 30, 45, and 60 days). I'm not sure which boards are set to what length. I'm not sure if anouncements and/or sticky notes are excluded. I'll get back to you on that.
For now - If you are a moderator and have something important - make it a sticky or announcement.... OR.... make sure important threads stay active.
I'll see what else I can find out about this. We should have some noticeable upgrades within the next month including how the forums are operated.
Az