IT does happen, often*.  It only works with ltc to btc.  The coins are sitting on the ltc block, in a btc address with 10 confirmation. Unfortunately multisig addresses both start with a 3. Bitfinex uses multi-sig deposit addresses. This is needs to be changed by the devs.  It is an issue with the ltc client.

What does the txid refer to?


*https://litecointalk.org/index.php?PHPSESSID=o4dprt1jkfdousqhgo709imto2&topic=26513.15