For testing I also tried a bet. It failed saying: Failed to place bet at a time
Are there any other guys out there who cannot withdraw / cashout their btc
Yes, I have an account with about only 0.01 BTC that is locked.
This happened in the past and was resolved then.
Even though I'm not affiliated with SatoshiDice, my guess is this:
It's their protection against denial of service, and that is overly sensitive. The code falsely detects more than 3 parallel bets and locks the account.
The lock should remove itself after a period of time but doesn't.
I'm 99.999% sure it will be resolved, as it was in the past.
Unfortunate but you will get your money.
Thanks for your feedback. I appreciate it.