[Backgroundrb-devel] failed to find slave socket

[Erik Morton]

I'm having a strange issue. The following error is printed to the  
backgroundrb_server.log file:

failed to find slave socket </tmp/backgroundrb.803/ 
verification_email_delivery_worker_fafbd1e29be8b802aef4a4ffc1a35754_0_0. 
126366358217085> - (RuntimeError)
20070124-17:41:29 (805) /usr/local/lib/ruby/gems/1.8/gems/slave-1.2.0/ 
lib/slave.rb:462:in `initialize'
20070124-17:41:29 (805) /Users/erik/Documents/projects/productblazer/ 
trunk/vendor/plugins/backgroundrb/server/lib/backgroundrb/ 
middleman.rb:210:in `new_worker'

What's strange is that no exception reaches the console:
 >> MiddleMan.new_worker(:class => :verification_email_delivery_worker)
=> "fafbd1e29be8b802aef4a4ffc1a35754"

Any thoughts? it's a fairly straight forward error message, but I  
can't understand why this worker would have an issue with its socket  
file when several others do not have this problem.