framebuffer

[wasp2k]

As shown on the image: https://www.dropbox.com/s/en1vp36igjl6p8f/20130814_224053.jpg
texts shown by framebuffer test application (fb-test) has some defects. Few lines on the top of the scree are shifted. The rest of the picture looks ok.

what could be the reason of this? and how this image defect can be fixed?

P.S. Strange what X11 works OK.

Thank you