Are There Any Themes For 1.7.5 Or Should I Downgrade To A Lower Release?

Ive just nstalled 1.7.5 fresh out of the zip and once i installed it onto my server set up admin account etc, ive noticed i dont have any kind of theme on my site, & when i attempt to install a theme plugin for 1.7 themes I get an error & white screen, I finally figured those themes were like 1.7.1 compatable, not 1.7.5. So my question is this, are there any 1.7.5 themes or an easy way to downgrade to like 1.7.1 with little hassle. Any advice would be a benefit.... :)