Quicksilver’s doc icon has always bugged me. It’s not an app. Good news, the latest B57 and B58 offer a preference setting for hiding the dock icon. The bad news is that B57 & B58 break Proxy Objects in Snow Leopard. I use Proxy Objects fairly regularly to open Current Selection in certain apps. Opt + Shift + M => Current Selection / Open With / Textmate; Opt + Shift + P => Current Selection / Open With / PhotoShop. After scouring the support forum I relented and just reverted back to B54.

Yay Proxy Objects are back. Boo, dock icon is still there, plus Preferences window is broken.