If you are using a self-hosted installation of WordPress, you may notice your blog doesn't seem to understand markdown. Unless you really enjoy only using plain text or writing HTML yourself, here are ways I have found to remedy the situation:

Option 1: Install Jetpack

Jetpack is the WordPress company's plugin to add all kinds of behavior to your blog. It makes your blog behave more like one hosted by wordpress.com directly. One of the many things it provides is markdown support. If this sounds like something you might like, you can find it here. For my own WordPress blog I run, I did not want all the other behavior and so I chose option 2.

Option 2: Install WP-Markdown

WP-Markdown is a much smaller plugin which only provides markdown support. After you activate the plugin, clicking a checkbox in settings will allow Publicist (and any other app) to work as expected. I chose this version because it seemed a better fit for my blog. You can find information about it here.

No matter which option you pick, you can get your blog fixed up quickly and get back to what's important: actually writing. Good luck!