Hi Ken,
To preview the file, I am using Component Art control which in turn makes ajax call to other page in my web site with file information. The page will be displayed as a dialog on my current page.
If I don't use preview option in my website, it allows me to upload files as many times as i want with no issue.
Below is the error console output in Firefox:
Error: XML descendants internal method called on incompatible XPCCrossOriginWrapper
Source File: http://localhost:50107/ItemManagement/ManageItems.aspx?contentID=0
Line: 0
Regards,
Music Patel.