What exactly did they fix in DP7?

[kappaknight]

I see a lot of the issues reported in DP6 still exist in DP7.

AirDrop, Handoff?, even the About this Mac's report of how storage is used is still mis-reporting stuff.

 

[Apple_Robert]

If you look in the front page article thread on the subject, you will see the release notes pertaining to the build.