Upgraded roller
OK, I've updated Roller from 0.9.8.2 to 0.9.9-stable 2. This fixed the inability to change themes, but I found a bug/strange feature where if I deleted the News folder, the Blogroll section gets repeated. The outstanding support of the Roller developers gave me a workaround within an hour of filing the bug. Fixing the display template macros cleared up the problem.
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