EDIT: https://bitcointalksearch.org/topic/m.936807
Yes, I'm very sorry. Firstbits.com had some upper/lower case mistakes recently.
It works correctly now. If something still seems wrong please let me know.
Our lookups are often slow also, I suggest you use blockchain.info.
Also, as one who has implemented the firstbits functionality, how hard to you think it would be to build into the satoshi client, and do you think that would be a good idea?
I actually have no technical skill at all. I just had the idea and got SgtSpike to implement it. The blockchain.info implementation was done separately.
I'll find out about sendmany and let people know.
I do not think integration into the main client is a good idea. Firstbits is risky, a typo costs real money. Satoshi integration is too much of an endorsement for new users to start using it without really thinking about it.