Hi Terry Tested a bit more and I can confirm that the OnFileValidating event is the one firing. However in my case I DONT have a OnFileValidating event and so don't want that postback to happen. I can see that CuteWebUI_AjaxUploader_OnSelect() gets called but returning false stops the entire select process and return will then just ...

Hi Terry, Okay -- just to confirm then... Even though I had no events in my markup and had the global javascript function returning FALSE for the postback it will still postback? There is no way to just have the httpmodule/handler do the upload and leave it at that? James

Terry I can send you my solution if that helps to see what I'm doing. Just need an email address or place to upload to? James

Hi Yes we saw that message and after it gets to it, it doesn't post back. _However_, before that it has already posted back and I don't understand why James

Hi We're currently evaluating the ajaxuploader for our application. We want the uploader to do it's thing BUT not do a postback -- we'll then do an ajax postback so that we can update some info and put the file into a database without doing a postback.  I've put in script as follows:-      function ...