jpchatt,

 

That is expected behavior.

 

Because when the Flash version >=10 or Silverlight version >=3

 

The addon do now allow javascript show the browsing dialog.

 

So AjaxUploader put a transparent layer , and let user click the Flash/Silverlight to show the dialog.

 

If you tab to the HTML button , it will fire button.onclick , it can't show the dialog.

 

So we can only show a warning panel , and try to let user click the Flash/Sliverlight again.

 

(Right click the button or the warning panel, you can see Flash/Silverlight menu)

 

 

If you want to avoid that issue, you can set 

 

UploadAddonButtonMode="Replace" (ASPX CODE)

 

Uploader.UploadAddonButtonMode= UploadAddonButtonMode.Replace; (C# CODE)

 

Regards,
Terry