SILLY SCRABBLE - Fred makes the word "CAT" to which Arnold adds "ACLYSM" to make cataclysm. The scrabble tiles change from shot to shot when the board is shown and their words wouldn't be possible from the varied configurations shown. Furthermore Fred makes the final bogus word "ZARF" by adding his tiles to a "Z" that wasn't there before (at the end of the long vertical word in the center).
The newspaper and yearbook are titled The Rockville Times and Rockville High respectively however they live in Bedrock.
Arnold is the Flintstone's paper boy and when he goes back to work after the scrabble game he's holding a stack of papers titled "BUGLE". Yet later Fred and Wilma are shown reading THE ROCKVILLE TIMES even though they live in Bedrock.