For certain mixed code scenarios, the order of dialogs showed up are changed. For example,
Signed applet calling unsigned jars specified as download extension inside the main jar manifest.

The order of dialog used to be selfsigned, unsigned then mixed code.

Now the order is selfsigne, mixed code then unsigned (if allow mixedcode). From what I observed, the mixed code security promise still holds. So mark the bug as p4. (and we are improving mixed code in 7u45, so the test cases are very likely need to be changed anyway soon).