Problem with image inside email body

Hello.

I am using FCKEditor in DadaMail. I wrote an email with an image in the text body, not as an attachment. I sent the email to my mailing list and some people with a gmail account reported that they couldn't see the email, only a large bunch of characteres.

I checked with my gmail account. In Thunderbird, I can see the email properly. In gmail's webmail, I see only the bunch of characteres.

Untill now, this was only reported with gmail.

Any clue about why this is happening, and if it really has to do with FCKEditor?

Thanks in advance,

Rodrigo Martinho.