Mirror effects transparency doesn't work. The transparency level set to 0.3 only adds opacity to the editor, but in simulator and on the device it still shows without any opacity. If transparency in mirror effects worked like other effects, it would be 100% possible to simulate a water surface effect depending on graphics used under the mirror. Please make this happen.
I must add. it blends well like a gradient in the simulator, only if it displayed the same exact way after the build.
+1. I noticed this today in a build. Looks like water reflection...awesome in simulator. Looks like crisp mirror with no water effects in build on device.