Hi,
testing the latest revision of lxappearance there is a glitch with automake 1.14 in sid:

http://pastebin.com/mdgK55Cy

this patch, recommended by LStranger solve this:

diff --git a/HEAD~1:configure.ac b/HEAD:configure.ac
index 27c934e..2115eb5 100644
--- a/HEAD~1:configure.ac
+++ b/HEAD:configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 AC_PREREQ([2.69])
 AC_INIT([lxappearance],[0.5.2],[http://lxde.org/])
-AM_INIT_AUTOMAKE([1.11 -Wall -Werror foreign])
+AM_INIT_AUTOMAKE([1.11 -Wall -Werror foreign subdir-objects])

 # intltool
 IT_PROG_INTLTOOL([0.40.0])

http://pastebin.com/d7PkUy8T

greetz Alf