Fatal error: Cannot use object of type stdClass as

What version of WordPress? (1.2, 1.3 nightly, current CVS)

Change the line 705 from this:
if ($res[0][‘Type’] != ‘varchar(32)’) {
to this:
if ($res[0]->Type != ‘varchar(32)’) {

I had that error when I was installing WP locally after installing a new server (LAMPP). I struggled with it for ages… but it seems to be a problem with PHP5. Delete the database, and recreate it. Switch to PHP4 (if you can), and try it again. Worked for me. If you are using LAMPP then this will switch to PHP4:
# /opt/lampp/lampp php4

I was installing XAMPP 1.4.9 on Windows XP locally and came up with the same error in my WP 1.2.1 Mingus installation. Editing line 705 as suggested above solved the problem.

Thanks very very much – that did it. I actually just downloaded WordPress (version 1.2). I wonder if this change be made by someone in CVS? Just about prevented me from using WordPress – other than this installation was a snap.
thanks to all the volunteers – I really appreciate this software – looks great!
Tim

This has indeed been fixed for some time in the 1.3 code.

Another way to fix the error is to change the line before it (704)…
$res = $wpdb->get_results($query);
to this:
$res[] = $wpdb->get_results($query);