I would wait 5-7 days on something like that, and just drop a nice little note with something to the effect of mentioning that sometimes attachments get dropped... I've had it happen myself several times. It's not completely unheard of.

I had the same thing happen last night with one post, but not with the other two...... So I have no idea what caused it, but I'll watch to see if it does it again should I post later...