No, you're fine
fewer is for countable quantities, less is for uncountable ones, like an amount of water.
(
_Felix 's school of dance and occult sciences,
Fri 12 Dec 2008, 13:40,
archived)
Thanks for the support
but you should have been here before I changed it
(
Barbarossa is not my real name,
Fri 12 Dec 2008, 14:48,
archived)