From TV Newser:
The left photo is the official first-pic-of-Katie released by CBS at this year's upfront. (TVNewser posted it in May.) The right photo is an edited version of the same photo, from the September issue of Watch magazine, which is owned by CBS.CBS: Your #1 source for objective journalism.
UPDATE: TV Newser has an update here, and let's give Katie props for her funny response to the kerfuffle:
"Through a spokesman, Couric says that she prefers the original photo 'because there's more of me to love...'"