as we are working towards getting our tests running in taskcluster which uses a docker container, there are main reftest failures in particular. This one is seen on try: https://treeherder.mozilla.org/#/jobs?repo=try&revision=0a238c213d3a&filter-searchStr=r1&selectedJob=14637552 REFTEST TEST-UNEXPECTED-FAIL | file:///home/worker/workspace/build/tests/reftest/tests/layout/reftests/border-radius/clipping-6.html | image comparison (==), max difference: 102, number of differing pixels: 124 Looking a the reftest analyzer from treeherder you can see the difference; http://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://queue.taskcluster.net/v1/task/Og4ayYWjQOC4dwpC3js6Rw/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1 In addition, you can toggle between each image and see the difference visually. This test already has a lot of fuzzing around it: https://dxr.mozilla.org/mozilla-central/source/layout/reftests/border-radius/reftest.list#54 I suspect we will end up doing the same to solve this by adding: fuzzy-if(gtkWidget,102,124) For reference we have a lot of other failures (bug 1232316, bug 1232979, bug 1232980, bug 1232981) which we are working on.

Should we NI for this bug? or not yet?

this is the approach we have used for a few other tests- still waiting on review on them, so this might not be the acceptable solution to use here. here is what the test looks like with the font change: http://people.mozilla.org/~jmaher/border-radius.html

Comment on attachment 8701082 [details] [diff] [review] add font-size:300 to the body to reduce fuzzy painting Review of attachment 8701082 [details] [diff] [review]: ----------------------------------------------------------------- Seems fine, the text is only there to prevent optimizations in layout that happen when the content consists of only solid colours.

Moving closed bugs across to new Bugzilla product "TaskCluster".