It may be possible in some browsers that the preloader is delayed. Just let the game load and it will be fine.
This is my first game using Flash CS3. I took this contest as an opportunity to try and learn some Actionscript 3. Now that it is finished I am glad I took the effort to make it in AS3, but there were many times when I thought "man I should just start again using Action Script 2". Its pretty buggy, but I hope you get some enjoyment out of it anyway.