ActionMailer encoding


I am using ActionMailer to recieve emails as per the usual method. I
use postfix.

My Database is setup for utf8 encoding. I get a database error when I
try to store email.body into a record in the database. This means that
action mailer is returning the body string in the original email

abstract_adapter.rb:128:in `log’: RuntimeError: ERROR C22021
Minvalid byte sequence for encoding “UTF8”: 0x92

Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1

How should I handle this? Must I use Iconv to manually convert this
data by examining the content-type field of the email? The body must
end up in utf8 form when it gets stored into the database.