Linus is the most recent character to bear that weird, slanted frown, which turns up frequently around this time.
More interesting perhaps is that this strip clearly shows how Snoopy's design has progressed. His snout is thicker, his ears clearly rise up off his head a little, he sets a better pose standing, and he seems to definitely be a larger animal than the early form of the character. He seems a bit more like a real dog here.
The text of ROASTED PEANUTS is copyright 2009-2011 by John Harris. No copyright is claimed over the comic strips, which are here under the principle of fair use. Strips presented for review purposes only. We love Peanuts a whole lot, and wouldn't dream of exploiting it. Please don't sue us; we're only trying to love. Thank you for reading this notice.