Hello! I don't know if it's a bug, but only happens me with Iron. I installed Iron 5 minutes ago and I have no any extension, it is on default configuration.
When I try to upload a file with .epub extension (for ebooks) in Uploaded.NET it says: "este archivo es de solo lectura intente de nuevo con un nombre de archivo diferente".
In english it must be something like this: "this file is read only try again with a different file name". On Internet Explorer and Google Chrome I can upload the file without any problem.
I tried to change its name but it is impossible. If I try to upload a PDF file, I can upload it without problems.