Why doesn't my logout link work?

I am using a child theme of twentyten. For some reason this code, which worked fine before in 3.0, doesn’t work and even more puzzling, only in Firefox. In Firefox, I click Log out, which does nothing. If I click it again, I get the “WordPress Failure Notice” screen which asks whether I really want to log out. I click log out there, and even that doesn’t work. Baffling and befuddling!

<?php if (is_user_logged_in()) :
	global $current_user; get_currentuserinfo(); ?>
	Logged in as <?php echo $current_user->display_name; ?> |
	<?php if ($current_user->user_level >= 5) : ?>
		<a href="<?php bloginfo('wpurl'); ?>/wp-admin">Site Admin</a>
	<?php else : ?>
		<a href="<?php bloginfo('wpurl'); ?>/wp-admin/profile.php">Profile</a>
	<?php endif; ?>
	| <a href="<?php echo wp_logout_url( get_permalink() ); ?>">Log out</a>
<?php else : ?>
	<a href="<?php echo wp_login_url( get_permalink() ); ?>" title="Login">Log in</a> | <a href="<?php bloginfo('wpurl'); ?>/wp-register.php" title="Create an account">Create account</a>
<?php endif; ?>