Here's the bug:
1. Two or more multi-select fields have the enhanced user interface option enabled. To simplify this, I showed only 2 in the linked screenshot.
http://dl.dropbox.com/u/60667761/Two-multi-select-fields-using-chosen-jquery-script.jpg
2. The 1st field is placed above the 2nd field, not side-by-side.
3. When the 1st field is clicked, a drop down menu appears.
4. The drop down menu is overlapped by the input box of the 2nd field. This problem only occurs on IE7.
http://dl.dropbox.com/u/60667761/overlap-bug-of-the-drop-down-and-the-input-field.jpg
Here is the form in action: http://localbizregistry.com/registration-form/
Click on the business categories check boxes to make the multi-select fields appear. I'd appreciate any support or patch in fixing this problem. Thank you.