Anyone ever heard of that before? I'm running AVG as my antivirus software, and it flagged that thing a few minutes ago. I've been trying to find out information about it in hopes of minimizing loss (I'm on my work computer, which means that any kind of hit is a NOT GOOD thing), but none of the virus library sites I've tried to hit have anything on it either with or without the [1] portion. Anybody here ever heard of this thing before?

Try googling "jquery.corner" - you will find that it is legitimate. It is used to shape window/object corners! The [1] would possibly indicate a duplicate.. the .js is just javascript.