by JIDE Support » Mon Jul 13, 2009 1:13 pm
Looks like this is a row height issue from the image you post. Please try invoke CheckBoxTree#setRowHeight() and see if it could solve your issue. If it does, please try debug to see if you invoke that method anywhere else. We would have to ask for a test case if you didn't invoke that method at all and get this issue.
Thanks,
JIDE Software Technical Support Team