Rails 3 beta3: mail_to displays incorrectly i.e. mail_to not returning html_safe string

In Rails 3 beta3 mail_to (when used in a view) is not returning a html_safe string.

Code in view:

<%= raw mail_to(supplier.email, h(supplier.email), :subject => "Bathroom Direct Order:", :encode => "javascript") %>

Returns this in the browser:

My temporary solution (code in view) use raw to get a html_safe string:

<%= raw mail_to(supplier.email, h(supplier.email), :subject => "Bathroom Direct Order:", :encode => "javascript") %>

This returns the correct line in the browser: xyz@xyz.com

I believe this needs fixing in the Rails 3 code.