I just emailed some folks images. Got a few warnings of something going wrong, so I then checked in my outbox. It showed that the images went, but there was a message that the "virus scanners were down, download at your own risk." Or some such. Seems to be back to working now, so I just assumed it was a time delay.

Edit: Just saw it again. Full message is: Gmail virus scanners are temporarily unavailable – The attached files haven't been scanned for viruses. Download these files at your own risk.

First time I've seen something like this, actually kind of glad they had this failure case coded for. :)