So, I upgraded from a working V8.4.0 installation to V9.6.0 using git, following the instructions.
It’s all good, except that some (not all) of the feeds from one node are not updating.
The inputs are all updating correctly, but not the feeds.
I looked back across the old forum and the only suggestion seemed to be to ensure date.timezone in /etc/php5/apache2/php.ini is uncommented and set to the correct timezone: it is.
Can anyone suggest a cure?