diff -Naur xfce4-settings-4.9.0~/xfsettingsd/xsettings.c xfce4-settings-4.9.0/xfsettingsd/xsettings.c
--- xfce4-settings-4.9.0~/xfsettingsd/xsettings.c	2011-05-25 19:23:21.000000000 +0200
+++ xfce4-settings-4.9.0/xfsettingsd/xsettings.c	2012-01-30 16:24:36.740554376 +0100
@@ -615,7 +615,7 @@
 
             /* special case for dpi */
             if (strcmp (name, "Xft.dpi:") == 0)
-                num = CLAMP (num, DPI_LOW_REASONABLE, DPI_HIGH_REASONABLE) * 1024;
+                num = CLAMP (num, DPI_LOW_REASONABLE, DPI_HIGH_REASONABLE);
 
             g_snprintf  (s, sizeof (s), "%d", num);
             str = s;
@@ -845,7 +845,7 @@
                     if (num < 1)
                         notify->dpi_offset = needle - notify->buf;
                     else
-                        num = CLAMP (num, DPI_LOW_REASONABLE, DPI_HIGH_REASONABLE) * 1024;
+                        num = CLAMP (num, DPI_LOW_REASONABLE, DPI_HIGH_REASONABLE);
                 }
             }
             else
@@ -853,7 +853,7 @@
                 num = g_value_get_boolean (setting->value);
             }
 
-            *(INT32 *)needle = num;
+            *(INT32 *)needle = num * 1024;
             needle += 4;
             break;