THE PILOT STATED THAT THE AIRPLANE ACCELERATED ON PACKED SNOW, BUT ENCOUNTERED STICKY SNOW AT THE END OF THE LANDING SITE ON THE KAHILTNA GLACIER. THE LEFT SKI CAUGHT IN THE SNOW AND THE AIRCRAFT NOSED OVER. HE STATED THAT OTHER AIRPLANES OF THE SAME TYPE AND LOADING WERE TAKING OFF FROM THE SAME LOCATION ALL DAY. HE BELIEVED THE SNOW TURNED STICKY DUE TO TEMPERATURE INCREASE.