"Pluto's status as our solar system's ninth planet may be safe if a recently discovered Kuiper Belt Object is a typical "KBO" and not just an oddball. Astronomers have new evidence that KBOs are smaller than previously thought."
"KBOs - icy cousins to asteroids and the source of some comets - are the leftover building blocks of the outer planets. Astronomers using the world's most powerful telescopes have discovered about 1,000 of these objects orbiting beyond Neptune since discovering the first one in 1992. These discoveries fueled debate on whether Pluto is a planet or a large (1,400-mile diameter) closer-in KBO."
Spaceflight Now

It seems the size of KBO's are in question from albedo measurements and factors used to determine there size. Although more data needs to be done it looks like Pluto's status as a planet will remain, or reinstated in some cases.

Never givein ;-)