problem in 2.8 multi-DB

Hello
I, used multi -DB
my websiteis Persian language.
May, when I upgraded to 2.8.2
And multi-DB version 2.8
Problematic
Text available in the database can not be displayed properly Shomoti
For example, instead of "????" "????" Is shown
When I use 2.7.5-BETA problem was
To assist me whole.