Hi Mary,
Thanks for taking a closer look. RE: Testing admittedly initially just a cursory click around main site areas but I've accessed a page using each of the layouts this afternoon with developer debugging enabled and no notices or error output. Installed from scratch using a 3.6beta+
Probably wouldn't hurt running the Behat suite but as that is a bit of a time investment might have to wait until a weekend when I have a few hours free to set it up and deal with the inevitable teething issues.
Joby