Well, you’re right Mat, everything works as expected at https://tiddlywiki.com/
So, I upgraded my wiki expecting the same, but not so:
Split sum and count behave as they did before - the space after the number is required. So if there are 2 tiddlers with a single number in the field for each tiddler, split sum and count are zero unless there is a space after the number.
The average calculation is now recognised in my wiki (before there was no output) but it doesn’t include the total from multiple entries in a single field.
I’ve uploaded something here to show the calculations working as expected and with the screenshots from my wiki showing the difference there.
Presumably there must be something in my wiki which is responsible for the different behaviour - would be good to know what.
Thanks
Jon