Sometimes the interpreted language equivalent of “compiler warnings” get really quite annoying (this might explain why subconsciously I have always been incredibly pedantic about compiler warnings).
Anyway, with advent of RubyGems 0.9.0, the “require gem” command is deprecated.
And as of 0.9.1 of RubyGems (to which you might want to update because of a security hole) — you know get lovely little warnings scattered all over the place
Warning: require_gem is obsolete. Use gem instead.
And of course things like the mongrel_rails command include “require_gem” — as does feed_tools — which of course is kicked off by cron jobs in our environment, and is now happily filling my root mail with the warning messages.