Today lifehacker ran an exclusive interview with Quicksilver developer Nicholas Jitkoff in which Jitkoff essentially says he is moving on and leaving Quicksilver to linger.
Jitkoff: I'm inclined to encourage users to move over to the more stable and well supported alternatives like LaunchBar. Right now QS 54 (ed: the current build) accomplishes everything that I really need, the problem is stability, which for some reason most people seem to be ignoring.
Lifehacker: Right, in the end stability is what matters most. I have a MacBook Pro that—until your recent updates—crashed QS on a very regular basis, which was always heartbreaking. But I've seen major stability improvements since the updates, which has been fantastic.
Jitkoff: Basically, that branch is condemned to a long slow death. I just don't know if the experimental one will ever be up to snuff. Hence the recommendation of third party apps.
Quicksilver's developer just told me to download Launchbar. The apocalypse has arrived.
I've noticed stability problems with Quicksilver since Leopard arrived. Primarily, it has shut down on me a few times requiring me to restart it. I've also helped a few friends troubleshoot some general Quicksilver wonkiness. While my initial reaction is that you'll have to pry Quicksilver out of my cold dead hand, you never know. Jitkoff also implied that he has something else up his sleeve and, since QuickSilver is now open source, some enterprising programmer may just take it to the next level. Time will tell. For the meantime anyway, I'm sticking with it. There is just way too much functionality to give this application up.
You can read the entire interview right here.