RadUpload has been replaced by RadAsyncUpload, Telerik’s next-generation ASP.NET upload component. If you are considering Telerik’s Upload control for new development, check out the documentation of RadAsyncUpload or the control’s product page. If you are already using RadUpload in your projects, you may be interested in reading how easy the transition to RadAsyncUpload is and how you can benefit from it in this blog post. The official support for RadUpload has been discontinued in June 2013 (Q2’13), although it is still be available in the suite. We deeply believe that RadAsyncUpload can better serve your upload needs and we kindly ask you to transition to it to make sure you take advantage of its support and the new features we constantly add to it.
When you try click the Select button of RadUpload it doesn't work, or you need to click somewhere else in order to bring the browser dialog.
The TextBox is wider or shorter than the text area of the File Input, or the Button is wider or shorter than the button area of the File Input.
Follow the instructions for changing file input width in File Input Appearance or set the EnableFileInputSkinning property to false.
In addition, check if you have the DocType set in your page:
<pre xmlns="http://ddue.schemas.microsoft.com/authoring/2003/5"> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> </pre>