Use the latest jQuery with your Drupal theme

template.php

<?php
function {theme_name}_preprocess(&$vars, $hook) {
		 if (arg(0) != 'admin' && $hook == "page") {
			// Get an array of all JavaScripts that have been added
			$javascript = drupal_add_js(NULL, NULL, 'header');
			
			// Remove the original jQuery library and Drupal's JS include
			unset($javascript['core']['misc/jquery.js']);
			unset($javascript['core']['misc/drupal.js']);
		
			// Add in our new jQuery library and Drupal's JS include
			// We do it this way to keep the includes in the same order
			$core = array(
				//Alternative jQuery
				drupal_get_path('theme', '{theme_name}').'/js/libs/jquery-1.5.1.min.js' => array(
					'cache' => TRUE, 
					'defer' => FALSE,
				),
				'misc/drupal.js' => array(
					'cache' => TRUE, 
					'defer' => FALSE,
				)
			);
		
			// Merge back into the array of core JavaScripts 
			$javascript['core'] = array_merge($javascript['core'], $core);

			// Rerender the block of JavaScripts
			$vars['scripts'] = drupal_get_js(NULL, $javascript);
		}
}
?>

Which admin menu are you using?

I was using a module called Administration, but now I'm using a module called Toolbars

wow Toolbar is really bad - switching to SimpleMenu. Working fine so far!

totally using this on http://i.seanja.com so I can use a lightbox plugin to show the images full size

Hmmm... it doesn't really work with compression turned on...

Does it include it? Does it include Drupal's jQuery instead?

I think it might be, I am going to try it out again when I get home to see what it is actually doing.