J.,
I would add a probiotic to her daily routine - the ones found in yogurt, sadly aren't quite enough. Osco has probiotic in chewable form - strawberry flavored - my kids love 'em. they have to stay refrigerated though.
I would say if she's not having any other symptoms, maybe put a call in to your doc, give more description (floating, loose, hard to pass, distressed, lethargic while having the pale poop episodes... that kind of thing...)though i know you said she seems normal otherwise.
I did find one link for you... i read through it and it explains the science of poop (ha! - kind of funny) and how our body digests, and what things can cause poop to be off in color, texture and smell.
http://www.enzymestuff.com/rtstools.htm
according to this site, it sounds like it 'could' be scary, but it may be simple as well... history of gallbladder problems in your family? could be gallbladder related - they remove those all the time - practically everybody in my family had it removed... i'm sure i'm next.
with the hepatitis stuff, it could be non-invasive to find out.. through bloodwork... I would ask the doctor to do some just so you can put your mind at ease.
good luck!
~J.~