Theme not showing up in Opera Mini browser

I have checked my website with a Nokia E72 running Opera Mini and also the Opera Mini emulator found here: http://www.opera.com/developer/tools/mini/

In each case, the website is totally blank - a white page.

Has anyone experienced/fixed this?

Edited to add: This site doesn't show up in an iPhone browser either.

Edited on March 5, 2013. Fixed!

I had an old plugin - Any Mobile Theme Switcher that was causing errors when I switched Wordpress to DEBUG mode. I disabled this plugin and it worked on mobile browsers.