When looking at the file samples/grid1.html from the zebra-samples in Firefox, you see that the grid elements are not vertically centered correctly. The distance between the upper border of a cell and the top part of the cell content is smaller than the distance between the lower border of the cell and the bottom part of the cell content.
I’ve provided a sample image
http://www.directupload.net/file/d/4340/2kvmw857_png.htm
In this schematic image, the red bar is shorter than the green bar. 
In other browsers the cell content looks alright (that means vertically centered correctly), this problem only occurs in Firefox. Is there a bug in zebkit?

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