Failed Install 9.10 Error 5

Attempted to install Ubuntu 9.10, Karmic Koala, only to have it fail with an error 5. The error message stated the cd drive or the iso could be bad. I will try again tomorrow after burning the cd at a slower speed. I did run the live cd and it performed very well. Even the wireless connection seemed snappy. I did not get to run a speedtest yet. I was very disappointed that they didn't include Firefox 3.5 but instead stuck with version 3.0.11. I thought Alpha release meant cutting edge? All in all it looks very good so far.