Sorry, my bad, I'm a fool.
Here is a picture of the front diff.
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This is what a leaky diff looks like, I had busted a seal on the drivers side.
The home dealership swore up and down that it was oil spillage, but it was not, I found another dealer who verified the leaking differential and fixed it for me.(warrantied)
It was also made apparent that spilling oil on that spot would have been a very complicated feat.
But to more accurately answer your question, leaking differentials is not a plague among libertys; I think I only recal it happening to one other person.