Hmm... you know, I think I've been doing them wrong.
The background is supposed to be clear... but it's coming out blue & gray & other sorts of shades... *sigh*
Sorry about that. When I figure it out, I'll let you know.
EDIT: (later in the day) Strange... now it seems the backgrounds are fixed... all by themselves. How wonderful.
I'm very happy.
NEW EDIT: (next day) I've discovered that on some computers the smilies I created have the messed up backgrounds and on others it comes out just fine... I wonder what the problem is...