FixedHeader bigger than Header - datatables 1.9.4

Hi,

I have a problem with fixedheader's configuration. It's bigger than original header.
Link to image for explain,
with fixed header : http://www.noelshack.com/2014-49-1417797100-with-header.png
without fixed header : http://www.noelshack.com/2014-49-1417797271-without-fixed-header.png

I am tried that but it has not resolved the problem :
http://datatables.net/forums/discussion/19954/misalignment-with-fixed-header
https://datatables.net/forums/discussion/20802/fixedheader-misalignment

Thanks a lot.