I've suspected this for a while now, and I finally got off my duff to check it -- and, gosh darn it, I was right! I HATE it when publishers and artists do stuff like this!
Exhibit A, from a two-page spread in Green Lantern #25:
Exhibit B, the cover of Blackest Night #0:
See that? It's Ivan Reis's exact same drawing of Hal in both instances, right down to Oclair's inks and Moose's coloring. Now, I understand all too well that sometimes publishers and artists have to cut some corners to save time and money. And I understand that Ivan may not have had anything to do with this decision. AND I understand that Blackest Night #0 is a FREE comic book. But whenever publishers and artists reuse artwork in this particular manner, I can't help but feel a little cheated.
S'okay, Ivan. I still love your work. I really, really do ...!