If the problem appears randomly, I would suggest that by accident you are increasing the browser zoom in IE8 to something between 105%-115%. When Ctrl key is pressed and using mouse wheel in IE the zoom will increase or decrease - depending of the wheeling. Pressing Ctrl key together with "-" or "+" will do the same. If you want to to set your browser to normal 100% view, you could use Ctrl + "0 (zero)" key combination.
Attached is zoom.zip
, which contains a video file captured from my desktop showing the buttons behavior when zooming in IE8.
Let us know, if this is the case or not and you need further assistance to solve the problem.
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