Overwrite image without dialog or prompt does not work?

[hans-reinders]

My settings:

in JPEGView.ini: OverrideOriginalFileWithoutSaveDialog=true
in KeyMap.txt: Ctrl+S IDM_SAVE_ALLOW_NO_PROMPT

The text in the ini file states:
; If set to true, Ctrl-S overrides the original file on disk, applying the current processings without
; showing a dialog or prompting the user to confirm.

However, for example rotating the image, and doing a Control-S results in a save dialog with also _proc appended to the filename ?