Not sure how hard it would be to re-write the script, but I think it would be neat to see a checkbox underneath the one where you can select snow until Jan. 4th. The new checkbox would be dependent on the one above it, and would say something like, "Background only".
I bring this up because, on one of my blogs, I intentionally used a winter scene in the background, so that it would look normal for snow to be falling. I wouldn't be surprised if other people do this as well. It would be cool to have the snow falling just on the background, for that specific reason. Also, because it would be less strain on the eyes. (I suppose the second reason is the better one.)
Hope all are well.