I found out that the black stripes are not being resized correctly but vanish after some time (highest zoom out value). Steps to reproduce: 1. Go to http://openclipart.org/people/portablejim/portablejim_Programming_addictive_sign.svg 2. Try to zoom in / zoom out as much as possible. Result: Black stripes not visible anymore.
Needs a reduced testcase. This is too big to debug.
Created attachment 400078 [details] testcase (as much as I could reduce) I was not able to reduce the testcase more. I hope someone from QA can help.
fixed by check in for bug 535185