Inline_attachment not working properly?

We are using the inline_attachment gem for emails. This gem
overloads the image_tag method. However, we get an error whenever we
send it a full URL, such as comes back from the AWS-S3 (Amazon) gem.

image_tag( ‘’)

results in the following error message

Error emailing discussion: No such file or directory - /Users/SteveK/

As you can see, the inline_attachment gem incorrectly assumes that it
needs to add the RAILS_ROOT path to the beginning. This is not the
issue with the standard rails version of image_tag.

Has anyone found a work around / fix? Is there something that I am
doing wrong?