My version is: edison-weekly_build_56_2014-08-20_15-54-05
and the url is:
http://downloadmirror.intel.com/24271/eng/edison-image-ww36-14.zip
Which of course was provided from: https://communities.intel.com/docs/DOC-23242
I have used the proper eject operation as well every time.
I hope that helps. If there a another image to flash please let me know and I will try that one out.
ril3y