Req help regarding Bug which was there in 2.6.3 but not in 2

As I said earlier its fixed in version 2.6.4, compare 2.6.4 & 2.6.3, update total 9 files(inside _source subfolder)::
fckshowblocks.js;
fckTableHandler_ie.js
fckDialog.html;
fckDomRange.js
fck_contextMenu.js
fck.js
fck_ie.js
fckDialog.js
fckselection_ie.js