AjaxControlToolkit Work Item is the #7 Blogger for Ajax
it seemsto be a simple CSS trick so please check and reslve it, in you sample at http://www.asp.net/AJAX/AjaxControlToolkit/Samples/ValidatorCallout/ValidatorCallout.aspx when you right click onpage and select Right-To-Left direction , thevalidator callout appears incorrect.
this tutorial will be about using the Mootools JS library with ajax, if you dont know a thing about ajax you will do just fine with mootools. but you need to have know some javascript to keep up.
Sun, Dec 20 | from Tutorialized.com