I've fixed the issue using the upstream patch. Thank you.
diff -Nru lxappearance-0.5.1/debian/changelog lxappearance-0.5.1/debian/changelog --- lxappearance-0.5.1/debian/changelog 2011-07-30 11:08:50.000000000 -0300 +++ lxappearance-0.5.1/debian/changelog 2011-07-31 19:07:22.000000000 -0300 @@ -1,3 +1,10 @@ +lxappearance (0.5.1-1.1) unstable; urgency=low + + * Non-maintainer upload. + * Bug #636093 fixed. + + -- Willian Gustavo Veiga <wilt...@gmail.com> Sun, 31 Jul 2011 19:07:06 -0300 + lxappearance (0.5.1-1) unstable; urgency=low * Removing useless whitespaces at EOL and EOF. diff -Nru lxappearance-0.5.1/debian/patches/fix-bug-number-636093.patch lxappearance-0.5.1/debian/patches/fix-bug-number-636093.patch --- lxappearance-0.5.1/debian/patches/fix-bug-number-636093.patch 1969-12-31 21:00:00.000000000 -0300 +++ lxappearance-0.5.1/debian/patches/fix-bug-number-636093.patch 2011-07-31 19:09:01.000000000 -0300 @@ -0,0 +1,22 @@ +diff --git a/data/ui/lxappearance.ui b/data/ui/lxappearance.ui +index c744f9c..132486f 100644 +--- a/data/ui/lxappearance.ui ++++ b/data/ui/lxappearance.ui +@@ -1358,7 +1358,7 @@ + <property name="visible">True</property> + <child> + <object class="GtkCheckButton" id="enable_antialising"> +- <property name="label" translatable="yes">Enable antialising</property> ++ <property name="label" translatable="yes">Enable anti-aliasing</property> + <property name="visible">True</property> + <property name="can_focus">True</property> + <property name="receives_default">False</property> +@@ -1375,7 +1375,7 @@ + <child type="label"> + <object class="GtkLabel" id="label23"> + <property name="visible">True</property> +- <property name="label" translatable="yes"><b>Antialising</b></property> ++ <property name="label" translatable="yes"><b>Anti-aliasing</b></property> + <property name="use_markup">True</property> + </object> + </child> diff -Nru lxappearance-0.5.1/debian/patches/series lxappearance-0.5.1/debian/patches/series --- lxappearance-0.5.1/debian/patches/series 2011-07-30 10:25:36.000000000 -0300 +++ lxappearance-0.5.1/debian/patches/series 2011-07-31 19:09:01.000000000 -0300 @@ -1 +1,2 @@ +fix-bug-number-636093.patch