Paint bucket tool with rotated transparent texture

[Anssi]

I create a model, and paint the front side of a face with a transparent material with a texture. Then I rotate the texture by 90 degrees. I look at the reverse side of the face. The texture is rotated there too.

Now I use the alt key to sample my rotated texture, and paint it on the front side of a second face. The back side of the face shows the texture as unrotated!
textureproblem.skp

Anssi