Error with Excon when uploading to rackspace with Fog -

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very recently, uploading of files rackspace cloud has started erroring on mac , 1 other mac in our office. same code base works fine on ubuntu servers , on third mac in office. error reports (excon::errors::socketerror) illegal seek (errno::espipe) pointing gems/excon-0.31.0/lib/excon/connection.rb:186:in `pos='"

this has been baffling me days. macs osx 10.9. if can offer assistance appreciated.

versions: fog(1.20.0) excon(0.31.0)


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