What do? Pale feces indicate?

See a doctor. Significant color changes that persist could be a sign of serious problems with you GI tract and you should see a doctor for a physical exam and get lab work done. Light colored or gray colored stool, especially if it floats, could mean a blockage of the bile duct that prevents the normal amount of bile from mixing with food and gives it it's normal color. Bile duct blockage can come from cancer.
Not normal. Hello. Prompt medical evaluation is warranted for extremely light stool. There are a number of possible causes such as hepatitis, cirrhosis, or obstruction of a bile duct (i.e., gallstone or a mass). Any significant change in bowel habitus warrants assessment.