I'm running wp 1.5.2 but originally installed 18.104.22.168, and I did try to search for this ...
When I first installed WP, and used the default theme, the theme name became automatically changed to the name of my blog, indeed a complete copy of the theme folder was created, named "blogname". Is this normal?
Okay, later I customized the theme, and gave it my own name (both it's folder and stylesheet entry) and everything works fine. Except, under Admin > Manage > Files it's still trying to find files in the path wp-content/themes/blogname/ - which no longer exists.
Where did I go wrong? And can I flush out the old theme references?