I just realized, the default star logos are 69x25, but we're always using 70x25 for custom ones. Also, it seems there's a few pixels of extra space under the logos too. I think somewhere between 70x27 and 70x30 would still fit.
Not really a bug (unless it wasn't intentional maybe) but I thought it'd be an appropriate place anyway. Plus I'm mostly curious what Ender has to say on it and he probably checks this section the most :P