Minecraft v1.4.5 crashed while trying to destroy snow under myself

I started new game, survival, type my random seed, and generated world.
I was in snowy biome, stucked into block [my player was "shaking", up and down ] and I tried to destroy block under me to unlock myself. After destroying snow block game crashed.

Destroying non-snowy block during "shaking" works as expected.

IMHO player should be placed a little higher than now to prevent stuck into block.