Comment 5 for bug 501873

I found that if the filter is applied to an object wider than the background image the discontinuities most often disappear and even export to bitmap works fine. I specify "wider" because it only works when object exceeds the width of the background image ; it doesn't work if it only exceeds in height) My workaround at the moment is applying the filter to a group which includes an object outside the background image (to the left or the right) like in the attached file.

If discontinuities appear when opening the file, simply Ctrl+click the quadrangle outside on the left and move it slightly. They should disappear and exporting bitmap should work right.