Not able to install Ubuntu 12.04

Just got the latest update today. I am using Lion.

I am getting stuck at a screen that looks like it is complete. It has the Unity Interface in a very small screen. Above the screen it says Installing Ubuntu Linux with "spinning indicator. It just stays at this window and never times out; and never completes. I waited over an hour.

I have tried a couple of times, if I close the window it ask me if I want to stop installation and then deletes the file.