Wordpress 3.3 Error : Warning: Invalid argument supplied for foreach() in ".."/class-wp-admin-bar.php on line 342

One of our sites Supercars For Sale was displaying an error message:
Warning: Invalid argument supplied for foreach() in ".."/class-wp-admin-bar.php on line 342

This occurred after the 3.3 upgrade.

The problem is caused by the theme - in this case "elements of seo" having TWO calls to wp_footer (one direct call, and a do_action).

The solution was to remove the do_action call.

That's it. Sorted.

Wordpress 3.3 Upgrades Completed

Out of the final three (mission-critical) sites, two went through smoothly.
One did not, and had to be upgraded via FTP, then remove the .maintenance file.
Anyway, that's it. All plugins updated, and all sites running on Wordpress 3.3.

Give it a week, and there'll be an urgent security fix, while everyone is off on their xm,as break..

Wordpress 3.3 Upgrades

We've started rolling-out Wordpress 3.3 to our sites, starting with the less mission-critical.
Site#1 went almost smoothly (timed-out), but resumed ok.
Site#2 went smoothly.
Site#3 timed-out in the middle of something crucial and broke the site..
The solution was to delete the ".maintenance" file in the root directory, download Wordpress 3.3, and then FTP the files up, and then run the upgrade procedure manually (just access site.com/wp-admin).
Site#4 was even worse - caused by SEO Ultimate plugin. Solved that by renaming the plugin folder, and ftping the files up, and running the upgrade manually.
Can't wait to start with the three mission-critical sites. That'll have to wait until we complete the office move. Did I mention that?
Sorted.