pgadmin stops working

To reproduce:

1. Select

Tools
Server configuration
postgresql.conf

2. Double click in log_statement line

3. Put checkbox into enabled

Enter all to Value field

4. Press OK

5. Press Save button in toolbar and answer Yes.

Observed:

pgAdmin exits without any message.

This occurs with 1.6.2 and with 
http://www.pgadmin.org/snapshots/win32/pgadmin3-20070612.msi with Windows 
Vista.

Andrus.