List Settings -> Alter Messages -> First strip reply to can't be set
On the List Settings -> Alter Messages page (lists/LISTNAME/settings/alter_messages) page, if I change the setting of 'First strip reply to' from Yes to No and Save changes, the page returns with the setting unchanged, however if I change, e.g. 'Include RFC2369 headers' from Yes To No and Save changes, the page returns with both 'Include RFC2369 headers' and 'First strip reply to' set to No, and similarly from No to Yes. I.e. 'First strip reply to' can't be set on it's own, but follows the setting of other submitted changes. (The same behavior is seen when changing other settings on the page.)