warning: array_keys() [function.array-keys] ... menu.inc on line 915

And instead of the text here so - ???????????????
What to do?
after delete all entries in the cache table, The mistake one has passed, and another:

warning: array_merge() [function.array-merge]: Argument #2 is not an array in /var/www/localhost/htdocs/includes/theme.inc on line 239.

has remained and all the same on a place of the Russian text - questions - ???????????

New data are entered and displayed normally, earlier entered - through??????? The table cache cleared some times

(!) And in phpmyadmin old data are visible normally what is it?
But the new entered data in phpmyadmin are visible as
функции / процессы
( Type of variables in the table utf8_general_ci )

root@office kiev1 # mysqladmin -uroot -p100 variables|grep char
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/

I in confusion
On other server where all is for the present normal - through phpmyadmin Russian letters too are visible so
функции / процессы

It has occured after small updating php+apache+mysql thus phpMyadmin as before and now normally writes and reads the base and old Drupal tables, and Drupal began to write and read base through any code conversion - help - where it is disconnected?

Probably it is bug Drupal