OWA 2010 SP1 Email sent to OWA 2003 attachments missing

Hi,

I Just upgraded our 2010 environment to SP1. We are currently staging the move to the 2010 from 2003. We just noticed that if we send an email from OWA 2010 to a users using OWA 2003 the attachment link is missing. It does shows the paperclip icon in the inbox.

Now if I sent from outlook 2010 to OWA 2003 the attachment is viewable. If I sent from OWA 2003 to OWA 2010 that attachment is viewable. If I sent from owa 2003 to owa 2003 the attachment if viewable.

Anyone else experiencing this or/and have any suggestions on where to look?

Thanks,

Rob