Try adding this to your theme’s functions.php. This fixed the issue on my site:
function my_function_admin_bar(){ return false; }
add_filter( 'show_admin_bar' , 'my_function_admin_bar');
Essentially it overrides the hook to show_admin_bar with a custom function, which returns false, and as a result remove the admin bar altogether.
Not sure if you’re after such an extreme solution but it worked for me. I didn’t need the admin bar anyway anyway as most of my site functions are already taken care of within my Firefox bookmarks.
Good luck!
