Comment 16 for bug 221112

Gnome default setup when Xorg keyboard is "fr"/"oss" leads to the "France Alternative" layout.

In this layout some application can't handle space caracter properly.
(See URL as some exemples).

Workaround is to force "France Alternative, latin9 only" in Gnome

or

change Xorg.conf replacing :

Option "XkbVariant" "oss"
by
Option "XkbVariant" "latin9"