Some tweaking of your browser may be in order here. Obviously, you need to clear your Flash cache-I'm assuming you did this. Also, go through your game options and make sure they are at what you had them. Then take a look at this thread:
http://wgt.com/forums/t/7987.aspx?PageIndex=1
It's a discussion about Flash and the different versions available. Chrome has an issue with the beta version so make sure you follow and apply what's in that thread. I have zero problems playing in Chrome with the correct Flash version.
Lastly, I'm sure WGT sees this but you can get a quicker response by going to them for help via e-mail. GL