Feature Request: Warn on ignored format in ~compromised input files (not so important)

I have opened a file in which I modified the Footer line to: <gnm:Footer Left="Druck: &amp;[DATE:dd.mm.yyyy] &amp;[TIME:HH:MM:SS]" Middle="" Right="Seite &amp;[PAGE:0,0#] von &amp;[PAGES:TEST]"/> The format of DATE and TIME is correct, but of PAGE and PAGES obviously ignored. I suggest that gnumeric warns on opening files with wrong Header/Footer format.

EDIT: gnumeric 1.12.44, 1.12.46