This was found in an ongoing project I am upgrading from php 4.0.4pl1

code sample:

$sql='select prodId, prodNum from products';
$result = mysql_query($sql);

do {
print_r($product);
print $product->prodId ." ". $product-prodNum
} while ($product = mysql_fetch_object($result));

print_r ($product) returns:
stdClass Object ( [prodId] => [prodNum] => E-U-00-002)
stdClass Object ( [prodId] => [prodNum] => E-U-00-003)
stdClass Object ( [prodId] => [prodNum] => E-U-00-004)

the real data would be prodId => 1, prodId => 2

the same thing done with mysql_fetch_array works perfectly (exact same sql, etc) 

I tried various loops (do..while, if, while) no changes.

Tested this with php 4.1.2 and 4.2.0 w/ same errors.  Works fine on 4.0.4pl1.

php configure options as follows:

'./configure' \
'--with-mysql=/usr/local' \
'--enable-track-vars' \
'--with-dbase' \
'--with-gd=/usr/local/gd-1.8.4' \
'--with-ttf' \
'--with-t1lib' \
'--with-jpeg-dir' \
'--with-png-dir' \
'--with-tiff-dir' \
'--with-apxs=/usr/local/apache/bin/apxs' \
'--with-config-file-path=/usr/local/apache/conf' \
'--with-pdflib' \
'--enable-ftp' \
'--with-zlib-dir' 

I am unable to provide a backtrace (production server, sorry)