White borders in fullscreen mode

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Hello,

I have problem in fullscreen mode on Windows 7 64-bit, with OpenCV 2.4.5:

cvNamedWindow("Projection", CV_WINDOW_NORMAL); cvSetWindowProperty("Projection", WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);

I create black fullscreen window, but there are two white 1px lines in corners (it looks like when i draw line from (0,0) to (windowResolutionY,0) and from (0,0) to (0,windowResolutinX)) maybe it some rest from borders of the window. Any advice? Thank you.