ActionMailer Inserting Extra Space

Hello,

I am using a web form to send automated e-mails. One of the fields
frequently takes a large amount of data. When the form is submitted
and the data sent on to ActionMailer, the e-mail is sent, but any
lines of text with 1024 characters or more get a space inserted every
1024 characters. Does anyone have more information on this issue?
Thanks.

Matt