Fortunately, Forum member 'npierce' has tracked down the cause of the problem:
I have put the patched 'fr' keyboard file into 'x_xorg76_mega_pkg-7.6-4-w5c.pet' and it is uploading right now.
Comments:Posted on 16 Feb 2012, 21:14 by esmourguit
Thank you Barry. i installed the new fr file and it works perfectly now.
Posted on 17 Feb 2012, 4:53 by 01micko
Early on in Slacko development Tasgarth found that Fr keyboard was broken and a similar fix was employed. I hacked the same file and came up with satisfactory results. It is in the z_base_hacks package which is at the Slacko repo on ibiblio and mirrors.