ENBSeries

Having this weird outline problem with ENB, specifically in 3rd person, but it happens in first person aswell.

Example: http://i.imgur.com/gRZG2Dx.jpg

It's caused by Temporal AA. It's a game specific bug that Boris have not been able to work around to remove those "motion blur lines"
Higher FPS reduces the effect while lower FPS increases the visibility of the effect.

There are a bunch of posts and answer to those posts scattered around this site. Search in the "Official Files -> Download" section and you shall find plenty of them.

Every transparent or moving object produce artifacts with temporal antialiasing and even with fix of transparent objects (by ignoring them) i can't fix the bug you have, because there is no data about per pixel movements of each object. Temporal antialiasing seems only can be used for high quality screenshots, if engine not developed for it.