Why doesn't my WordPress theme show up in the preview panel?
If your theme isn't showing up in your WP admin section *at all*, then this post is what you're looking for.
Just a quickie for anyone who makes their own WP themes
I've spent an hour picking my way through forum posts, trying to find out why my theme doesn't preview through the Dashboard > Design page. It works fine, as you can see, but preview is just a blank white page.
Turns out that WP doesn't like theme directories with spaces in them. Theme *titles* with spaces are okay, but for the actual directory in wp-content/themes, you need to use underscores or hyphens or something else instead.
Tags: themes
Hyphens will cause the same problem in some cases.