http/tests/xmlhttprequest/xmlhttprequest-onProgress-open-should-zero-length is flakey on leopard build bot http://build.webkit.org/results/Leopard%20Intel%20Release%20(Tests)/r49988%20(6423)/http/tests/xmlhttprequest/xmlhttprequest-onProgress-open-should-zero-length-pretty-diff.html is the first example I've noticed.
I rewrote the test yesterday (http://trac.webkit.org/changeset/56550). It should not be timing dependent anymore.
We don't have any platform specific expectation for this test. So marking this as 'RESOLVED CONFIGURATION CHANGED'.