FYI, there are now additional error messages printed from libXSLT while running run-webkit-tests. These were introduced by new "failure-case" layout tests which I added as part of: http://bugzilla.opendarwin.org/show_bug.cgi?id=5875 They are caused by our current XSLT error reporting architecture which dumps errors to the console (instead of to the generated webpage) due to: http://bugzilla.opendarwin.org/show_bug.cgi?id=6040 If they get too annoying we can either turn off XSLT error reporting in debug builds... or fix 6040. -eric