who knows about where to use latex house paint?

[keakar]

yes I know, USE IT ON YOUR HOUSE. yuk yuk yuk now to be serious:

I have some extra (4 gallons) walmart brand "Color Place Exterior Flat latex Paint, White" and I was going to use it for the interior of the house. its left over from a 5 gallon bucket so I cant return it and I figured I would use it for the ceilings and trim inside the house.

somebody told me not to use it inside because exterior latex paint is different and I should go buy some interior paint for inside. I know in the past exterior was oil based so there was good reason you didn't want to use it inside but since everything is latex paint now, so my question is, is there really a reason any more not to use the exterior latex paint inside and if so why?

If I was buying new paint I would buy it for its intended use and I realize exterior latex is still made a little different to stand up to being outside but does that make it not suitable for interior use?

any painters or paint contractors out there can clue me in as to the do's and don'ts of latex paints?