Two issues (version 3.97u):
a - 'home-home' and 'home-home-home' don't work ('end-end' and 'end-end-end' do work).
b - numeric keypad 5 working incorrectly: it moves just the cursor to the vertical center of the window (thus moving the cursor to a different line), should scroll window contents so that the cursor (and the line it's on) are in vertical center of window.
brief emulation
Thanks for sending in the bug report.

What regional keyboard settings are you using
Also, could you run this test:
For me it means start of line, start of page, start of document and that is the behaviour I'm seeing.
To fix this just edit the keyboard map as before, hit the Num 5 key, select the ScrollLinePageCenter and reassign that key.
I will fix that mapping issue at this end
Cheers Jussi
I can't replicate this issue at this enda - 'home-home' and 'home-home-home' don't work ('end-end' and 'end-end-end' do work).

What regional keyboard settings are you using

Also, could you run this test:
- Use the Options, Editor Options and use the Keyboard panel to editor edither the Brief or BriefEx mappings
- Type in the Home key and you should see that the function mapped to that key is the MoveDocumentStartEx
- If it is not bound to that function then selected the MoveDocumentStartEx function and hit the assign button

For me it means start of line, start of page, start of document and that is the behaviour I'm seeing.
This does look like a bug as the that key is bound to the MovePageCenter function.b - numeric keypad 5 working incorrectly: it moves just the cursor to the
vertical center of the window (thus moving the cursor to a different
line), should scroll window contents so that the cursor (and the line it's
on) are in vertical center of window.
To fix this just edit the keyboard map as before, hit the Num 5 key, select the ScrollLinePageCenter and reassign that key.
I will fix that mapping issue at this end

Cheers Jussi
My fundamental problem was that I didn't actually have one of the Brief emulations selected. It's not at all intuitive (to me) that one has to press the 'Active' button to select the highlighted emulation. The 'home-home' and 'home-home-home' key combinations now work as expected. I have also reassigned the numeric keypad 5 as you indicated. Thanks.