I came accross some old images of how a message alert looks like on https://www.bricklink.com/help.asp?helpID=125.
But since BrickLink doesn't look like that anymore, my suggestion is to update
the pictures. It is (or at least sounds) very simple and turns these useless
images into helpful ones. Maybe there are other images (or even texts) that ask
for an update too, but I only came accross this one.