Description:
------------
I checked on PHP 5.0beta too and the same problem there.  pg_fetch_object returns serial or integers as NULL while but returns varchars in the same record as string - pg_fetch_array returns the entire data correctly.  Similar code worked fine on another server using MySQl Support.

You need a table like this:
CREATE TABLE public.feeds
(
  feedid serial NOT NULL,
  uri varchar(255) NOT NULL DEFAULT '',
  category int4 NOT NULL DEFAULT 0,

  CONSTRAINT feeds_pkey PRIMARY KEY (feedid),
  CONSTRAINT feeds_uri_key UNIQUE (uri)
) WITH OIDS;



Reproduce code:
---------------
<?php
$pgConnectStr = "... your connect string";
$link = pg_connect( $pgConnectStr ) or die( "Could not connect" );

$stat = pg_connection_status($link);
if($stat == PGSQL_CONNECTION_OK ) {
  echo "connection_status: OK<br />";
} else {
  // report connection error                                                                                                        
  echo "connection_status: BAD<br />";
  echo( pg_last_error($link) );
}

$feedb = pg_query( $link, $sql);
echo( "<br />".pg_num_rows( $feedb )." Number of rows returned.<br />" );
// for each row in the table stuff the coresponding variables with the data:                                                        
                                                                                                                                  
echo ( "ARRAY<br />" );                                                                                                             
while( $fields = pg_fetch_array( $feedb ) ){                                                                                        
  echo ( "<br />Feed[0]: $fields[0]<br />" );                                                                                       
  echo ( "<br />Feed[1]: {$fields[1]}<br />" );                                                                                     
  echo ( "<br />Feed[2]: {$fields[2]}<br />" );                                                                                     
}                                                                                                                                   
                                                                                                                                    
echo ( "OBJECT<br />" );

while( $row = pg_fetch_object( $feedb ) ){

  if( $row->FeedID == NULL) {
    $id = "NULL";
  } else {
    $id = $row->FeedID;
  }
  echo ( "<br />FeedID:".$id."<br />" );

  $uri = $row->uri;
  echo ( "<br />uri: $uri<br />" );

  if( $row->category == NULL) {
    $c = "NULL";
  } else {
    $c = $row->category;
  }
  echo ( "<br />category: $c<br />" );

}
?>

Expected result:
----------------
We expect the serial and integer values to appear in the result from pg_fetch_object

Actual result:
--------------
You will note that the output produces NULLs instead.