I've downloaded the litecoin client and am trying to create an address. How do I generate one? Everything I put in results in a message: The entered address "" is not a valid Litecoin address.
Are you referring to the litecoin-qt client with GUI? Button "Receive coins" -> Button "+ New Address"
Alternatively you can also create addresses on liteaddress.org. But be sure to save it to your hard disk first and execute it offline. Otherwise your private key (ie your right to spend the money) will travel through the net and possibly be stolen.