Here's another texture Lock bug we found.
1 - Add a cube to a New level.
2 - Apply default texture to cube.
3 - Lock textures on Block.
4 - Move cube to the right, in top view.
5 - Unlock texture.
6 - Move block up and down in top view.
7 - Textures now move on the faces that are perpendicular (90 degrees) to the move direction.
8 - Before the texture was locked and Normally, these faces textures don't move, when moving the block in that direction.

Jethro.