I was using B54 up until I upgraded to FF3.5. After that trying to open webpages would not spawn a new tab. That was enough to get me to upgrade only to find the same thing. I have since found out it is an interrmitent FF issue. Other apps trying to open a link in FF have the same problem and a restart of FF clears the symptoms.
Regarding Quicksilver, my largest gripe right now is I cannot move the bezel interface. This is the one I am used to using, but I like it in a different part of the screen. I can install and use all of the other interfaces fine and can move almost all of them (I don't think I tried to move flashlight). The upside to this is I now use the window interface and the websearch plugin icon does not sit on top and offset of another icon. So if websearch is giving you an eyesore take a new interface for a spin.
