here is a patch :)

From: http://railsforum.com/viewtopic.php?id=14293

ActionView::Helpers::TextHelper::AUTO_LINK_RE = %r{
(

<a\s.*?>.*??|               # Opening <a> tag.. and any other text including html tags which might be before a url
[^\w]|                      # or, first char before url
^                           # or, start of line

) (

(?:https?://)?              # optional protocol
(?:[-\w]+\.)+               # subdomain/domain parts
(?:com|net|org|[a-z][a-z]|edu|gov|biz|int|mil|info|name|museum|coop|aero) # TLD
(?::\d+)?                   # Optional port
(?:/(?:(?:[~\w\+@%=-]|(?:[,.;:][^\s$]))+)?)*     # Path
(?:\?[\w\+@%&=.;-]+)?       # Query String ?foo=bar
(?:\#[\w\-]*)?              # Anchor

) (

(?:[^\w]|$)                 # Trailing Character

) }xi

ActionView::Helpers::TextHelper.module_eval do
def auto_link_urls(text, href_options = {})

extra_options = tag_options(href_options.stringify_keys) || ""
text.gsub(ActionView::Helpers::TextHelper::AUTO_LINK_RE) do
  all, leading, url, trailing = $&, $1, $2, $3
  if leading =~ /<a\s/i # don't replace URL's that are already linked
    all
  else
    text = block_given? ? yield(url) : url
    url = 'http://' + url unless url =~ /^https?:\/\//
    %(#{leading}<a href="#{url}"#{extra_options}>#{text}</a>#{trailing})
  end
end

end end

Could you please provide a patch according to the guidelines specified on the contributors guide?

http://rails.lighthouseapp.com/projects/8994/sending-patches

Thanks!