Well I haven't got a clue what is going on it is on every page, using the Babylon theme.
For a short time I didn't see the Simple Machines Logo, but now this darn ugly Post a Reply image.
I have checked the other Themes and it isn't in those, but it is (for me at least) with the Babylon Theme. Since only 8 members are using the Babylon theme most are unlikely to see it. However, OC's image looks like Babylon theme, though it could be the forum default, weird.