Dave,

I have personal experience as well as the science to back up what I said.  I've seen Clarity sprayed right alongside soybeans in central KS when daily highs were well into the 90s F.  No hint of injury to the beans, decent weed control in the corn where the Clarity was applied. 

Are you sure of the weather conditions in the instance you cite?  -- is there no chance at all the wind was blowing lightly towards your beans when the neighbor sprayed, which then carried fines onto your beans?  Are you sure he was using Clarity?  

Who is Walt?