Case Of The Disappearing Tags
COREBlog accepts input formatted as "Plain Text (HTML OK)", structured text and HTML. The source says "wiki format" too.
COREBlog then strips "unsafe" HTML tags from its input using stripogram by Chris Withers. The tags it accepts are ('b','a','i','img','pre','blockquote','br','p','h3','ul','li','br'). This is why your, well, my nicely-formatted HTML input to COREBlog is munged.