I just upgraded to 2.7.
Here goes:
1. All hebrew chars are still question marks

even when i edit a page (or create a new one) and type in hebrew chars, once i press the save button it all turns to question marks.
2. In the backend, all hebrew words are reversed (ISO visual instead of windows-1252), i have to change the encoding every time i move to another section of the admin area.
3. is it safe to try to restore from the 2.6.4 sql file using phpmyadmin?
should i do anything else?