[mythtv-users] Can't start mythfrontend due to missing theme

[Sasha Z]

I've installed the mythtv themes tarball, and confirm that all the
themes exist in /usr/share/mythtv/themes. I have:

G.A.N.T.  Minimalist-wide  Titivillus-OSD  blueosd  default     oldosd
Iulius    Titivillus       blue            classic  defaultosd

Yet, when I try to start mythfrontend, I get this:
Could not find theme: Iulius
Couldn't find theme Iulius

What's wrong? How can I change the theme back to blue from mysql?