Inconsistent display of NULL and empty string values

Hello,
I have a usability problem with pgAdmin, namely it displays certain
values in different ways depending on a part of the application.
Here is a screenshot of the problem: http://i.imgur.com/xrEYt.jpg

NULL values are shown as <NULL> in the query editor, but as empty
cells in the data editor.
Empty strings are shown as empty cells in the query editor, but they
are double apostrophes in the data one.

This issue makes it hard to check data in the tables, because you
constantly have to remind yourself how the data is represented in each
view.

I'm working on pgAdmin III v1.16 x32 (installed with binary of
PostgreSQL 9.2.1), English language, on Windows 7 x64.

Regards,
Arkadiusz Piekarz