in practice mode with free ball the screen goes white blank with an explanation sign in a circle in the middle of the screen. this has happened twice.
Happens at least once EVERY game I've played since the update, don't hold your breath waiting for them to fix it!
Yes, I get the white screen with a "!" pretty much every round, sometimes 2 or 3 times a round.
It is so common, it might be re-labelled a game "feature" down the track :)
After Googling it, it may signify that your browser is running low on memory. : (
If you are using Maxthon browser that sounds like a flash crash. You might try another browser or roll back to a previous version of flash. A Firefox based browser like Pale Moon 64 or Water fox would be a good choice.