/summon ItemFrame only allows for 90 degree rotation

/summon ItemFrame ~ ~1 ~ {TileX:499,TileY:57,TileZ:-922,Direction:0,Item:{id:lever},ItemRotation:0}

This is just a tiny bug in the snapshot code. ItemRotation (added before the 1.8 snapshots) only supports 90° rotation not the 45° that we can now use in the new snapshots.
ex. ItemRotation:1 give 90° clockwise rotation but ItemRotation:0.5 give 0° rotation.

Looking forward to the 1.8 release!!!