[pgadmin-support] Error when editing data on a table

I am using pgAdmin 1.22.0. Often when editing data on a table via the "view the data in the selected object" icon, I get the error: ASSERT INFO: ../src/common/wincmn.cpp(478): assert "GetEventHandler() == this" failed in ~wxWindowBase(): any pushed event handlers must have been removed BACKTRACE

[pgadmin-support] What does "+01" mean in a timestamp field

What does "+01" mean in a timestamp field, for example: "2015-06-28 22:00:00+01" I am assuming it is timezone information. Thanks