Re: Transaction disappeared in the void...

Bitcointalk

2010-07-29 22:08:31 UTC - Original Post
If the transaction didn't go out immediately at first, like if you weren't connected at the time, it may take up to 2 hours to resend it.  Long term, it does keep relentlessly sending it.

I'll shorten that length of time in a future version.

You do need to have downloaded the complete block chain (currently 71040 blocks) before you'll see any confirms.  Same with the recipient.