Yes, what the title says. See my userpic. :D
And yes, cropping = ♥ too. XD
Hmm, who would this be…? XD
BTW, all of these are from the same image file; just with different HTML background colors. :D Also, IE would totally miss the effect 'cause it doesn't support PNG alpha blending, unless your LJ layout has the custom HTML code that enables it in IE.