Yes. And as a reminder (mainly to myself), remember to change the contract on BOTH charting software and brokers software!
If you're referring to the big contract, the P stays. U Goes to Z (SP3U will be SP3Z), course these things have been so damn slow recently I'm not sure if anyone will notice a difference.
deadreader, as a NexTrend user, you were setting yourself up for all this confusion This Thursday, change the P to T for all relevant emini contracts. http://www.nextrend.com/sysnews/v5-0/FuturesSymbols.asp Your trading software (as opposed to charting) is another story.