[MysticCat]

Originally Posted by OTW

Actually, according to this, either way is correct.

Actually, not really, at least not according to the article to which you linked:

"Ah, the quirks of our cobbled-together language! 'Campus' and 'stadium' came to us from Latin, just as, of course, 'alumnus' did. In Latin, the plurals are "campi" and "stadia."

But this is English we're speaking. . . .

Using Latin plurals isn't necessarily classier than going with the ordinary ones. For instance, 'campuses' is completely, exclusively standard. Saying or writing "campi" is a gaffe akin to wearing formal clothes to a backyard barbecue." (Emphasis mine.)

Sorry. Couldn't resist.