I know that this isn't about the actual content of the site, but would someone mind explaining how you gain reputation, what it means, and how it affects how many stars you have under your avatar? I have 3 stars, and I wonder how I got it and how I move up to 4 or 5 stars. Thanks, guys! Also, what is "warning level %"?

Reputation scores are simply determined by the number of "likes" a member has accrued. It's fairly useful at capturing the quality of someone's posting history (reputation relative to number of posts). This, like a number of other things, will be revamped to give weight to attachments uploaded, post-to-like ratio, tenure and a few other variables. "Likes received" will probably be shown separately while being incorporated into a reformulated reputation system.

Stars are determined by user group and number of posts. It's a default feature of the script.