There are no behavioral changes in version 6.5.1.0.

Oracle Language Technology (OLT) language analysis has been upgraded to OLT 1.4 in this release, providing many improvements in search accuracy for those languages configured to use OLT.

International Components for Unicode (ICU) is upgraded to 51.2. In this upgrade, the default accent ordering behavior for French has been changed; and backward accent ordering, previously the default for all French locales, is now applicable only to Canadian French (fr-CA). Updates and fixes have been made in the collation of other languages as well.