I have the same problem on 3.0.5: standalone services are not being saved.
It would be great if the plugin did the following:
– disabled the Visual tab in the “Edit Post” page if the post is set to Markdown; if this isn’t possible, then at least give a popup warning if the user clicks on the Visual tab.
– when entering the “Edit Post” page of an existing Markdown page, the tab is automatically switched to the HTML tab *before* WordPress does any bad conversions
