I've had trouble posting a character.
The first time I tried, I forgot to add any hat or scarf, and could not enter my e-mail address as the '@' was not being recognized.
I tried again and was successful, and even managed to enter the competition by typing my e-mail address - although it wasn't made easy as every time I typed '@', " appeared, which meant that my address was not recognized.
I then typed " in my address, and '@' appeared on the screen!
I haven't been given a unique number though, and I can't see myself in the crowd. Does it take a while to appear?