Postgres 9.2.2 Bug in Select with Left Join

Hello,

i have here a strange bug.

a_name (char var 48)  is sometimes empty  in the select of the new 9.2.2 Version,

the a_name is in the table column set.

Something is going wrong.

here in screenshot same identical database on  9.2.1 Server and 9.2.2 Server

that’s not good.