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wow, many thanks for that link. I knew Quicksilver's source had been open sourced for further development but I hadn't seen any info on when new builds would start being available.

I was still using ß52 from back to 2007! (Amazed that it was actually working in Snow Leopard)
 
is it doing anything weird or just flat out not doing anything when you try to invoke it?

When I start the program it shows the QS splash but doesn't fade away, rather it just cuts out. This I confirmed meant it was crashing. But I have figured it out, it was a plugin problem. I removed the plugins folder from the Preferences and the program loaded fine. So now I am adding the plugins I need and that is fine cause a lot of the plugins I have installed don't really get used.

plugin conflict is the problem.
 
I'm still having an issue. It will not stay open. I can't even get to the app's pref pane.
 
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