I asked the similar question in my post http://www.blackberryforums.com/gene...ttachment.html
in some cases, i can download pictures without issues. in some cases, i have to retry it multiple times in order to download them.
by the way, when you said it wouldn't retrieve it, did you mean you got the email, but when you tried to open the attachment or retrieve the attachment, it won't work;
or, your BB did not even retrieve the email body at all?