[Please help]DataTables horizontal scrolling: column's width header and content doesn't equal

riverstore

I get that problem on Chrome and Safari (work great on FF, IE, Opera).
I googled for a week but nothing can help!
Here is the link to my site:
http://lapvo3.com/news/modules.php?name=atntdatatable&lop=10A1&thang=11

ID of the sort table: example

Please help me to solve that problem.
Thanks a lot!