Rails 1.2.1 and RubyGems require_gem error
Interestingly both Rails 1.2.1 and RubyGems 0.9.0 were released within days of each other. The essential RubyGems release was to fix a security vulnerability.
There are now warnings popping up all over the place in rails complaining about how require_gem is obsolete. Hopefully rails will be further updated to fall in line with this new release of RubyGems.
Warning: require_gem is obsolete. Use gem instead.