Just nstalled b19.
No changes to my system since previous beta that I can recall
And got this message
I clicked DenyThe "Live" software on your computer has changed and wants to wants to access your keychain. Do you want to allow this?
This change is permanent and affects all keychain items used by this software
Details
Changed Process: Live
Application: Live
b19 opened and installed Lessons 8.0
I quit Live
(Unfortunately, fresh from bed I didn't think to create a bug report snapshot first)
Opened Live again
Same keychain message
Clicked Deny again
Then this happened
http://forum.ableton.com/viewtopic.php?f=25&t=110322
These may be 2 separate issues but I've included the link as I felt they may be related.
Edit:
I have not yet deleted the b16 folder from my Applications folder in case it is of any significance.