> some of my posts disappear. I posted a reply to the smokeless tires post, and it was there right after I replied, but is now gone. I know I didn't swear or anything in it, so I was wondering if something was screwy with the forum software?

Did you actually post the message, or did you just preview it? Remember that posting a message is a two step process; first you preview, then you post. I got careless earlier today with that very thing and had to retype a message.