UTF-8 and validates_length_of

Hello,
according to

http://wiki.rubyonrails.com/rails/pages/HowToUseUnicodeStrings

Rails is not ready for UTF-8 in many places, e.g. the
validates_length_of method. However, I see UTF-8 used in many Rails
applications. So, hopefully, is the wiki page now out-of-date?

Cheers,
Nils