It would be very helpful if people could check their Munki repos and see if they have any packages with a Distribution file named anything other than exactly “Distribution”. One way to do that would be to cd into your repo’s pkg directory and run this:
find . -name "*.pkg" -type f -exec xar -tf {} \;| grep Distribution
If anything other than “Distribution” is printed on any line, I’d love to know what that is.