Post preview does not respect markup mode

[pageer]

When previewing a post, the markup mode specified in the editor does not seem to be respected. It looks like it's just using what's stored for the draft. To reproduce:

• Create a draft post with LBCode markup mode.
• Open the draft.
• Change the markup mode to HTML. Edit the post so that it's valid HTML (using TinyMCE) with multiple paragraphs.
• Click the preview button

Expected results: The post should display the expected two paragraphs of HTML.
Actual result: The post is all on one line.

[pageer]

It looks like this might actually be an issue with the HTML editor. It seems like maybe TinyMCE isn't syncing the HTML content to the textarea when I expect it to. It seems like if you close the preview and do it again, it actually displays as expected.