Paramount originally had the rights to the Peanuts cartoons, but Warner signed a deal recently for the DVD distribution rights. Their first release is a "remastered deluxe edition" of
Be My Valentine, Charlie Brown with the same two bonus specials from the original Paramount release:
You're in Love, Charlie Brown and
It's Your First Kiss, Charlie Brown.
I'm usually skeptical about rebuying a DVD. I'll normally only do it for an improved transfer or better features. I'm happy to say that this new release of
Be My Valentine, Charlie Brown justified a repurchase.
Here's a thumbnail comparison of the picture quality of the old Paramount release and the new Warner release:

The old release looks like a slapdash job, with a bit of overscan visible on the left, and washed-out colors. The new release was obviously cared for, with much warmer colors and better framing.
In short: If you're a Peanuts fan -- buy it!