Recently Dobrakov,
Batt and Berg, and Brooks and Lewis have studied the class of strongly
bounded operators on continuous function spaces in detail. In many cases, these
operators coincide with the weakly compact operators and therefore form a
norm-closed two-sided ideal; and it is known in general that the strongly
bounded operators form a normclosed left ideal. In this note an example is
presented which shows that the strongly bounded operators do not form a right
ideal.