Release 9.0.0 DP-5

[Richmond Mathewson]

For anyone other than myself who might possibly care about this sort of 
thing:

9.0.0 DP-4 runs on Mac OS 10.7.5

while

9.0.0 DP-5 does not

[which means that when I want to explore its features I shall use the 
Linux version]

Richmond.