You managed to omit a link to the site. How shall we say what remedies to apply to a site whose appearance we can only imagine?
But this advice anyway -- perform some A/B testing, see if proposed changes actually work before making them permanent.
http://en.wikipedia.org/wiki/A/B_testing
> Any ideas are welcome, no matter how outlandish!
I offer this outlandish suggestion: provide a link to the site so people can offer meaningful advice.