Module stopped working after days of success...

The module was working beautifully for days - thank you so much for what I consider one of the most valuable drupal features - then stopped working inexplicably. Now, when attempting to translate into any language, only a partial doctype is shown followed by a blank page (see http://eutopio.com). The site translates fine at translate.google.com. I've tried disabling and re-installing the module making sure that clean URLs were enabled first, creating new blocks, limiting the number of languages, etc. Any suggestions?

Thank you so much in advance for your help!