String buzz

[Mary Smith]

Jeff,

I cannot resist a good damper mystery. Sounds like board movement is the 
cause of the intermittent buzz on that damper lever. I'd carefully observe 
the bottom of the levers, and remove enough material from the wood of the 
offending lever to clear the string when lifted. I know it doesn't resolve 
the issue of why that one is the only one doing it, but it probably would 
make the buzz go away most efficiently.

Cheers,
Mary