Why are the tips of the flap track fairings painted red?
Elaborating on Peter Kämpf's comment: The flashy tips are for preventing accidents during ground handling operations, e.g. by belt loaders. This can be a painting or an adhesive tape (possibly reflective, useful at night).

According the pages referenced below, this is done for the A320 family aircraft for which the flap track canoe fairings are not low enough to be obvious, not high enough to not cause a problem.

It seems this is a company decision not required by regulation. Several airlines do it.

Variations on the painting (taping):


Only the fairings close to the locations where ground handling personnel works.
Only the right side of the aircraft.
Also the winglet.
Color used: Red, bright pink, reflective green.


Photo Taha Ashoori on Airliners.net (source)


Photo Vin Lane-Kieltyka on Flickr (source)


(Source)


References (non authoritative):


Air Canada Flap Track Fairing Speed Tape? (Airliners.net).
Why Do Airliners Paint Trailing Edge Flap Fairing (Airliners.net).
Colour On Flap Track Fairings (Airliners.net).