The following code produces an error

if ( isset($adodbobject->Fields('myresult') ) ) { // do something }

PHP throws an error ( not warning ) saying:
Parse error: parse error, expecting `','' or `')'' in /path/to/index.php on
line 45

However, when I modify the isset to  look like this:

$_q = $adodbobject->Fields('myresult');
if ( isset($_q) ) { // do something }

It works fine.

Is this proper behavior for isset, or is this a php bug? I can't search google groups for "->", or any other search engine for that matter. So it has been tough trying to see if anyone else gets this error.