Are there any dependencies for unrevoked3 to run on stock ubuntu?

I cannot get unrevoked 3 to run on either my laptop or desktop which both run 64 bit Ubuntu. Is there a dependency I need? I download and extract to ~/Downloads cd ~/Downloads gksu ./reflash ...and nothing happens. Based on this Ubuntu forums thread, it seems to be a conflict between 32/64 bit. Is there a way to get this 32 bit application working on my 64 bit system?