Subject Box shows within body of HTML email

When viewed on a mac

[mumford]

Hi

I have designed an HTML newsletter. When I view the email on a mac, the subject of the email displays in the body of the email.

Does anyone know ehy this is?

Thanks for any help

[BlobFisk]

Hi mumford,

Which email client are you seeing this on?

[12inch]

Can you also post the source code of the newsletter?

Anand