Question on payouts -- sometimes my payouts show up in the wallet as "Received with", sometimes they show up as "Mined" -- what's the difference, other than "Received" matures in 6 confirmations while "Mined" doesn't mature until 120 confirmations?
Essentially, "Recieved" transactions are bitcoins that came from another account. "Mined" transactions are bitcoins that were generated; as part of the block reward. They did not come from anybody; they "appeared" out of thin air.
The Eligius mining pool usually distributes each miner in the pool it's reward as part of the "generation" transaction of each block. Other pools put the reward in an account they control, and send it to the miners when they request it. Many here believe Eligius system is superior (apart from the inconvenience of waiting for the 120 confirmation maturation time) because Eligius never actually controls any bitcoins: Therefore Eligius cannot be hacked and stolen some coins, neiter can the pool operator run away with the money.
However, it occasionnaly happens that there is a problem, and the reward system cannot correctly put each miners reward in the generation transaction correctly. In those cases, the reward is indeed sent to an Eligius-controlled address, and sent to the miners ASAP, usually not more than a day after it was due. However, in those cases, you see the reward as a "recieved" transaction, and not a generated transaction. However those issues are occasionnal.
EDIT: Fixed some typos