via http://www.xbox-scene.com/xbox1data/...VyBJMZfpVV.php

Team Jungle released a new version of JungleFlasher.

What's new/fixed:
* Minor release to tighten up error handling..
* An unforseen issue with slow drives ( seemly with Winbond Spi)
* SlimKey support
Added: Delay added following Drive authorisation, small % of drives seem slow and were failing on fwcrt cmd 21, others return empty data
Added: Total abort for failed fwcrt cmd 21 error
Added: Total abort on Key sector verification failure
* Firmware File Parser
Added: Parse abort on key sector verification failure for Slim dummy.bin
Added: Serial area fixer support for Slim.. to repair data for "others"

Official Site: http://www.jungleflasher.net