I am surprised that no one has yet written anything about actions(second) pane. It remains the single largest issue for me and continues to haunt me.
I removed my entire applications support folder of quicksilver and let B56a6 a create new one.
I installed the text manipulation plugin and enabled proxy objects. Did nothing else.
I tried to create "Current Selection>>Append to" but i dont even get the action "append to" while creating the trigger though it is available to me in the second pane of quicksilver when "Current selection" is in the first pane.
