Bitcoin wrong address What will happen if someone does not copy and paste the "To" address properly?

For example:
If my address is 1xxxxxxxxxxxxxxxA

and the person tries to send money to 1xxxxxxxxxxxxxxx
(note the missing last alphabet)

will the transaction go through and will the coins be lost?

Thanks!
Ryan
From the bitcoin wiki:


  Several of the characters inside a Bitcoin address are used as a
  checksum so that typographical errors can be automatically found and
  rejected. The checksum also allows Bitcoin software to confirm that a
  33-character (or shorter) address is in fact valid and isn't simply an
  address with a missing character.


In other words, your wallet shouldn't let you sent coins to a bad address, and servers won't accept the transaction.