Looks like I already found a few bugs! If you select a post to edit from your existing posts, it seems to wrap paragraphs in a
<div xmlns="http://www.w3.org/1999/xhtml">and add additional line breaks.
Also, the html editor is not syntax highlighted, and doesn't use a fixed width font. No easy way to wrap chunks of code in
<pre>tags. More importantly no spell checker. I'm probably going to stick to using the rich text editor built into blogger.com until they fix all this stuff.
More bugs! If the connection to blogger.com fails when you are editing a post, the post as edit button disappears. I have to restart performancing to get back normal behavior.