I stumbled into blogs.perl.org last night. Here's a couple "quick start" tips for using this install of Movable Type Pro:
(1) Code blocks. If you choose Format: Markdown, leave a blank line, indent text with 4 spaces, then another blank line
you will get code blocks like this # with some $rudimentary = "syntax highlighting";
(2) Blog subtitle. Erez Schatz was kind enough to point out how to set your blog subtitle (e.g.: Mutation Grid, Inc. "Controlled software evolution." above): From the blogs.perl.org page, click on Post, then, on the top menu bar: Preferences - General, the subtitle is "description".