"uncaught exception: Syntax error, unrecognized expression: #" after 7.x-1.4 update

Upgrading to 7.x-1.4 from 7.x-1.3 results in broken Javascript on page. The console in Chrome just outputs the following message:

Uncaught Syntax error, unrecognized expression: #

I'm running the latest core and the latest of all my other modules. I should also note that I'm using jquery_update set to version 1.5.2.

Here's a list of every other JS file included on the page in case there's a conflict somewhere.

/sites/all/modules/contrib/jquery_update/replace/jquery/1.5/jquery.min.js?v=1.5.2
/misc/jquery.once.js?v=1.2
/misc/drupal.js
/misc/ui/jquery.ui.core.min.js?v=1.8.7
/misc/ui/jquery.ui.widget.min.js?v=1.8.7
/misc/ui/jquery.effects.core.min.js?v=1.8.7
/misc/ui/jquery.ui.button.min.js?v=1.8.7
/misc/ui/jquery.ui.mouse.min.js?v=1.8.7
/misc/ui/jquery.ui.draggable.min.js?v=1.8.7
/misc/ui/jquery.ui.position.min.js?v=1.8.7
/misc/ui/jquery.ui.resizable.min.js?v=1.8.7
/misc/ui/jquery.ui.dialog.min.js?v=1.8.7
/sites/all/modules/contrib/views/js/jquery.ui.dialog.patch.js?v=1.8.7
/sites/all/modules/contrib/token/token.js?v=1.0
/modules/contextual/contextual.js?v=1.0
/sites/all/modules/contrib/jquery_update/replace/ui/external/jquery.cookie.js?v=67fb34f6a866c40d0570
/sites/all/modules/contrib/jquery_update/replace/misc/jquery.form.min.js?v=2.69
/misc/ui/jquery.effects.drop.min.js?v=1.8.7
/misc/vertical-tabs.js?v=1.0
/misc/form.js?v=7.31
/misc/states.js?v=7.31
/misc/ajax.js?v=7.31
/sites/all/modules/contrib/jquery_update/js/jquery_update.js?v=0.0.1
/sites/all/modules/contrib/admin_menu/admin_menu.js
/sites/all/modules/contrib/admin_menu/admin_menu_toolbar/admin_menu_toolbar.js
<script type="text/javascript">
<!--//--><![CDATA[//><!--
window.CKEDITOR_BASEPATH = "/sites/all/libraries/ckeditor/"
//--><!]]>
</script>
/misc/tabledrag.js
/sites/all/modules/contrib/devel/devel_krumo_path.js
/misc/textarea.js?v=7.31
/misc/progress.js?v=7.31
/misc/autocomplete.js?v=7.31
/misc/machine-name.js
/sites/all/modules/contrib/references_dialog/js/references-dialog.js
/modules/field/modules/text/text.js
/misc/collapse.js?v=7.31
/modules/filter/filter.js
/misc/tableheader.js
/sites/all/modules/contrib/hierarchical_select/hierarchical_select.js
/modules/menu/menu.js
/sites/all/modules/contrib/metatag/metatag.vertical-tabs.js
/profiles/acquia/modules/pathauto/pathauto.js
/modules/node/node.js
/sites/all/modules/contrib/conditional_fields/js/conditional_fields.js
/sites/all/modules/contrib/field_group/field_group.js
/sites/all/modules/contrib/safeword/safeword.js
/sites/all/modules/contrib/workbench_moderation/js/workbench_moderation.js