Hello !
I'm using abundance and events-manager pro plugin.
I've a problem with date picker on front end (not in back end).
Events manager Pro Support told me that both jquery versions are loaded on website : 1.7.1 and 1.8.
I've updated WooCommerce version which is the 1.5.6 one.
Of course I've tried to desactivate all plugin, even WooCommerce to see where was the problem.
I've tried date picker with twenty eleven theme with all plugins activated, and it works.
Is there a way to clear this problem ?
Look code in wp_head.
<!-- plugin and theme output with wp_head() -->
<meta name='robots' content='noindex,nofollow' />
<link rel="alternate" type="application/rss+xml" title="La ferme de Trosly » Programme 2012 Flux des commentaires" href="http://site.com/programme-2012/feed" />
<link rel='stylesheet' id='woocommerce_chosen_styles-css' href='http://site.com/site/plugins/woocommerce/assets/css/chosen.css?ver=3.3.2' type='text/css' media='all' />
<link rel='stylesheet' id='admin-bar-css' href='http://site.com/wp-includes/css/admin-bar.css?ver=20111209' type='text/css' media='all' />
<link rel='stylesheet' id='events-manager-css' href='http://site.com/site/plugins/events-manager/includes/css/events_manager.css?ver=3.3.2' type='text/css' media='all' />
<link rel='stylesheet' id='avia-woocommerce-css-css' href='http://site.com/site/themes/abundance/woocommerce-config/woocommerce-mod.css?ver=3.3.2' type='text/css' media='all' />
<script type='text/javascript' src='http://site.com/wp-includes/js/jquery/jquery.js?ver=1.7.1'></script>
<script type='text/javascript' src='http://site.com/wp-includes/js/jquery/ui/jquery.ui.core.min.js?ver=1.8.16'></script>
<script type='text/javascript' src='http://site.com/wp-includes/js/jquery/ui/jquery.ui.widget.min.js?ver=1.8.16'></script>
<script type='text/javascript' src='http://site.com/wp-includes/js/jquery/ui/jquery.ui.position.min.js?ver=1.8.16'></script>
<script type='text/javascript' src='http://site.com/site/plugins/events-manager-pro/includes/js/events-manager-pro.js?ver=3.3.2'></script>
<script type='text/javascript' src='http://site.com/wp-includes/js/jquery/ui/jquery.ui.mouse.min.js?ver=1.8.16'></script>
<script type='text/javascript' src='http://site.com/wp-includes/js/jquery/ui/jquery.ui.sortable.min.js?ver=1.8.16'></script>
<script type='text/javascript' src='http://site.com/wp-includes/js/jquery/ui/jquery.ui.datepicker.min.js?ver=1.8.16'></script>
<script type='text/javascript' src='http://site.com/wp-includes/js/jquery/ui/jquery.ui.autocomplete.min.js?ver=1.8.16'></script>
<script type='text/javascript'>Thread from Events manager support.
as of 5.1.7 we’re completely using wp’s internal jQuery UI library, the only external library we use now is timepicker, which doesn’t exist in the jQuery UI (the day it does, we’ll switch that too). We’re integrating with WP as much as we can to avoid these issues.
I’m certain another plugin, your theme is doing something wrong here, this is out of our control. Looking again at your site, and actually this is somewhat surprising, your theme or WooCommerce is adding another jquery ui core library on top of the WP loaded one, meaning version 1.7.1 and 1.8.x is loaded together. I’d bet that’s your problem right there, and this is almost certainly Theme or WooCommerce’s fault.
Thank's for your help.
Create a new thread and tell me what problems you are encountering and what you want to know. 
There is no step 3 :) 
