This works (a part of a bigger program):

if( $inforow ){      // $inforow = mysql_fetch_row( blabla ); (line 87)
  do{ // (line 88)
    if( 3==4 ){ echo( "" ); }  // couldn't solve prob so tried this...
(line 89)
    // commented away previous code, lines 90-100
    $cost = $row[1];  // $row = mysql_fetch_row( another blabla); (line
102)
  }
}

But THIS does NOT work (added a line):

[code]
    if( 3==4 ){ echo( "" ); }  // line from above, this worked (line
89)
    if( 1==1 ){ echo( "" ); }  // this does NOT work! (new line 90)

[code]

These kind of "errors" seems to appear from time to time without
notice.
They sometimes produce a "Document contained no data", and sometimes 
they produce a "parse error" error-code.

This is the error:

  "Parse error: parse error in /home/httpd/html/test.php on line 87"

Without the "new line 90" the program works fine and produce the
requested data.

Very critical bug since the error can not be traced (since there is no
error).
Thank you for looking into this.

  /Kalle Alm

Please upgdate to 4.0.1pl2. Seems that you have case of memory
corruption here.