Congratulations on adding litecoin (LTC) to the site.

It was added right above namecoin in the list of the types of coins that are allowed to mine.  My automined coins were set between bitcoin and namecoin (the rest were unchecked).  With the addition of litecoin, bitcoin and litecoin were checked, namecoin was unchecked.  You may want to check your settings to make sure your automined coins are set properly.