I'm moving a bunch of websites from independent installs to a single multisite install.
This seems to be going smoothly, but I noticed that the upload directories have changed from
<upload directory> to
<upload directory>/sites/<site id>.
While the change in the link appearance is unlikely to cause me any real trouble (even though I tend to care about link stability), I don't like that an implementation detail as the multisite install is "leaks" through this public facing path.
Can you think of any other "giveaway" that a website is using multisite?