Wal-Mart's new starburst logo mimics the cleaner, brighter sign of competitor Target Corp., with its iconic red-and-white bull's-eye.

Wal-Mart has attempted in several ways to update its image in recent years. Gone from almost all its signage is the once-ubiquitous yellow smiley face.

Last year, Wal-Mart also changed its corporate uniform for store workers, retiring bulky blue polyester vests in favor of khakis and polo shirts similar to those favored by Target and other retail chains.