I have a simple request for Blogger, Wordpress, and other blog providers. When I edit the HTML for an entry, don't modify it!
Both of these services will alter your HTML after you save it. This causes a problem for example, when you want to post code in a <textarea> tag. In Blogger it will place a <br> tag after each newline in the entry, and fills your textarea with line break tags. In Wordpress it just places all of the content in the textarea on one line.
Tthe funny thing is that one of my blogs uses a four year olf version of Movable Type, which has no WYSIWYG editor, but DOES NOT alter my HTML code.
To both of these blog providers I ask, please don't touch my HTML!