Code:
RewriteBase /
RewriteRule ^vb35rc1/blogs/([A-Za-z0-9-_]+)/images/([A-Za-z0-9-_]+)/?$ vb35rc1/images/$2 [L]
That's a cleaned up version of Dark's code. There's no need to escape characters within the character classes in mod_rewrite. Also needed to add an optional trailing slash otherwise when users add a / on the end of your URL it'll break. I'm having trouble trying to see exactly what you are doing here though...