BUG #1659: primary key accepts null value

The following bug has been logged online:

Bug reference:      1659
Logged by:          Ä°brahim
Email address:      ibrahimbayer@gmail.com
PostgreSQL version: 8.0.2
Operating system:   Windows XP sp1
Description:        primary key accepts null value
Details:

i m using pg 8.0.2 in a project with Visual Studio.NET at Windows Platform
but when i send a null value to my Prmary Key column it accepts that value.
I think it is a hard problem and i cant delete the null valued primary key
column by PgAdmin3 can you help me about this? Thanks Ä°brahim BAYER
Computer Engineer