I printed the Parametric Tardis from the link below and had a couple of issues with 13.05.2 / 13.06, in comparison to 13.04. Using the same settings, version 13.04 is the only version to properly do the thin wall light on the top. I created my own object stl with just the roof w/ light and tried it on all three version with multiple settings changes. Again even after that 13.04 was the only version to do the light.
http://www.thingiverse.com/thing:13109
Thanks