http://cr.openjdk.java.net/~prr/8145584/ https://bugs.openjdk.java.net/browse/JDK-8145584
The bug is that the code that tries to measure where the bounds of the rendering is not applying the same rounding of the rendering position as the rendering path does. It seems this test was just waiting for the right circumstances to come along to expose the bug. The test that fails was closed but I have determined we are OK to open it. -phil.