Hi. There's a bug in launchpad:

http://launchpad.net/bugs/272606

which needed this simple fix to make the dot key in keypad to actually produce a dot and not a comma:

--- xkb-data.orig/keycodes/evdev        2008-11-12 09:50:51.000000000 +0200
+++ xkb-data/keycodes/evdev     2008-11-12 11:39:16.000000000 +0200
@@ -309,4 +309,5 @@
 // For brazilian ABNT2 keyboard.
 xkb_keycodes "abnt2" {
     include "evdev(evdev)"
+    <KPPT> = 129;
 };

I'm not sure if there is a better way to fix this, but this has been proven to work.