Martin Brown
Since CIELAB is a colour space intended to manage just noticeably colour differences more optimally than the naive RGB colour space it isn't too surprising that you cannot *see* a difference in the final JPG taken from RGB or via CIELAB. But they are very slightly different.

Eric Stevens
Agreed, but the question is, does the difference matter?

Sandman
That wasn't, however, "the question", Eric. You quote Dan saying this:

"RGB>LAB>RGB is damage free"

That is an incorrect statement, which nospam has corrected. That is all.