[Anderkent]

A client sets his mining address directly to their MtGox deposit address. Different client tries to withdraw the funds. MtGox grabs a couple output it owns without regard to its age and tries to send it to the withdrawing client. The transaction is delayed because some of these outputs are fresh.

[im3w1l]

But "everyone" is poolmining. And the pools are surely professional enough not to mine directly into mtgox?

[Anderkent]

Not sure if serious. First of all, 'professional'? In bitcoin?

Anyway, how does the pool know the address you gave it is a mtgox deposit address rather than a personal address of yours?

[free652]

p2pool is one example.

[nkuttler]

I see, thanks. I don't really see how that could lead to so many dealyed transactions though.

[Anderkent]

A freshly mined coin is not valid for 120 generations. That's to avoid transactions being voided if the very end of the blockchain switches (if the chain is A->B->C, and you spend coins mined in B in C, but then the chain is overtaken by A->D->E->F, your transaction is invalid (coins genrated in B won't appear in the new chain))

[nkuttler]

Yes, I know.