Crypto Coins News - Ratings - Reviews
https://blockchain.info/tx/168886622efc7f3539717d851d670b144a183adcf7e8352c7993c3416f7a8e51 <— Erroneously shows transaction as "unconfirmed". [Update: Intermittently can sometimes show confirmed. Hit reload, state may change to Unconfirmed.]
This is a recurring problem for that Blockchain explorer service.
The problem with this is people aren't seeing their transactions confirm and conclude that the Bitcoin network is "slow" as a result. The problem in some instances is actually just that the Blockchain viewer they are using is reporting false information.
There are a number of blockchain explorers available: https://en.bitcoin.it/wiki/Category:Block_chain_browsers
Some of the most widely used / useful: