Groo, the Wanderer Easter Egg - Hidden Messages

The comic book "Groo the Wanderer" is written and drawn by Sergio Argonnes. An outstanding tale about a dimwitted warrior that wanders around the earth creating havoc however well intentioned.
Every issue has a secret message hidden somewhere in the issue. It is usually hidden in the background somewhere. The message reads "This is not the secret message." The comics are hilarious and hunting for the hidden message just adds to the fun!!