It seems to be impossible to create specific CSS rules for a tiddler that has spaces in the title. While an ID gets generated for the tiddler and contains the title, the spaces are not removed or replaced. Since spaces function as selectors in CSS, the tiddler cannot be accessed with CSS.
Example: Name of the tiddler: "Wendy Rene Forever" Generated Code: <div template="ViewTemplate" tiddler="Wendy Rene Forever" tags="music Wendy Rene" refresh="tiddler" id="tiddlerWendy Rene Forever" class="tiddler selected"> -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To post to this group, send email to tiddlyw...@googlegroups.com. To unsubscribe from this group, send email to tiddlywiki+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/tiddlywiki?hl=en.