Problem with dojo-tabs

We had a page with dojo-tabs. This worked very well in the Confluence 2.x version. After we upgraded to version 3.1.1, this page loads very slow and the tabs on top of the page are not available anymore. Is this functionality still supported?

We get following page error:

Foutdetails webpagina

Gebruikersagent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET CLR 1.1.4322; InfoPath.3)
Tijdstempel: Tue, 3 Aug 2010 08:38:54 UTC

Bericht: Could not load 'dijit.nls.dijit_nl'; last tried '../dijit/nls/dijit_nl.js'
Regel: 16
Teken: 5869
Code: 0
URI: http://wikiwiki/s/1724/18/1.0.1-SNAPSHOT/_/download/batch/com.scr.confluence.plugins.dojo.resources:all/com.scr.confluence.plugins.dojo.resources:all.js