The Florida State Board of Administration, Tallahassee, will withhold its votes for re-election to the board of Michael D. Eisner, chairman and CEO of the Walt Disney Co., Burbank, Calif., said Coleman Stipanovich, executive director. The $102 billion system owns 7.3 million shares of Disney. The board is concerned about one person holding both positions, Mr. Stipanovich said in a statement. A board spokesman declined to elaborate. The board is voting for the other directors, the spokesman said.