Sending to a P2SH address is standard. Spending from that P2SH address is only standard if the script that hashes to that address is standard.
The address prefix is selected to start with a 3 on the real network, and a 2 on the test network.
I don't know about Bitstamp or Mt. Gox specifically, but any service built on a current bitcoind should support it just fine. I suspect that most services support it and may not even realize it.
Topic: P2SH Transactions help (Read 696 times)
To answer your other questions, they are standard, and the addresses do use a different prefix byte.
Well MtGox for one does not support P2SH addresses 
Im struggling to find documentation on the BIP 16 stuff - the 'Pay to Script hash' transactions...
1. Are these now counted as 'standard'? or will I be waiting a long time for confirmations?
2. Is the address format different? ive seen somewhere that P2SH addresses would have a '2' prefix instead of '1'. is this true?
3. How much support is there for this ... could I get Bitstamp/MtGox to withdraw my BTC to a P2SH address?
thanks for any help
1. Are these now counted as 'standard'? or will I be waiting a long time for confirmations?
2. Is the address format different? ive seen somewhere that P2SH addresses would have a '2' prefix instead of '1'. is this true?
3. How much support is there for this ... could I get Bitstamp/MtGox to withdraw my BTC to a P2SH address?
thanks for any help
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