radio buttons disappear in IE

I love your forms component for Joomla!. Makes my life easier. I am having an issue with the radio buttons not displaying in IE. They are fine in firefox. I found a work-around. If I put a dash (or anything else) in the 'Instructions for users' then the radio box group shows up. The offending line of code is in frontforms_tight.css; .cfdiv_radio input { float:left; }. The webpage on my test server is http://trezza.rjrtest.com/index.php?option=com_chronoforms&view=form&Itemid=109.
The missing option group is above the group that is visible, and can be seen if you view source. The page is using a 960 grid, which I use for layouts. Any ideas?

Hi dbrewer,

I can only see the problem in IE7 and it appears to be something to do with the floating of the various pieces. If you remove the float from the 'clear' div it all looks OK.

Bob