When trying to change to a theme installed by the parent of the tenant website in Orchard, it is not possible to change or preview the theme.
In the parent website, the theme shows as enabled (it can only be disabled), it previews correctly and can be switched to etc but in the tenant website, it is not possible to do either of these and it appears to be disabled (the "enable" link is shown).
So in the tenant website when you click preview on an installed theme in the themes admin section, you just get a 404 - request not found for /Admin/Themes/Preview/
Machine specifics: Orchard v.1.1.30.0 (zip file installation pointed to in IIS) on IIS7.5, windows7, using hosts file entries to fake the domain names.
Any ideas?