Arrows instantly go down when shooted

When i shoot an arrow in creative mode, the arrows instantly goes down when about 1,5 blocks away from me, then dissapear, and re-appear on the place where they land normally. In the screenshots you can see better what happens. This happens both in creative and survival mode.

*update: This issue has als be posted here some time ago for Minecraft 1.4 and 1.6.