UNetbootin is not compatible with Ubuntu 13.04 and its variants

Hi,
During the testing cycle of Raring Ringtail (13.04), we have noticed that UNetbootin has failed to create a LiveUSB for any ISO image we have tried to create. Sometimes it works, sometimes it does not.

Are you guys aware of this issue? I have been using UNetbootin for 2 years now (almost) and never failed or let me down. With 13.04, I had some disappointment.

So, what is going on?

Thank you!

P.S.
I love this project, keep it up :)