This still exists as a problem ....

I too would like to understand if it is possible to rectify the windows on the cube ......

Although it will work well if no windows are on the surface of the cylinder ........

http://youtu.be/HIlNBLt_FVo

But strange things happen once a window frame is present ......

http://youtu.be/Erw33az0DOA


Going back to 12.04 was my only solution upto now .......... and 14.04 still has this problem as shown above in
the videos which were in 14.04 ... (still in testing though)