=== modified file 'src/sp-guide.cpp'
--- src/sp-guide.cpp	2012-04-01 14:01:02 +0000
+++ src/sp-guide.cpp	2012-07-30 18:23:25 +0000
@@ -196,8 +196,14 @@
     switch (key) {
     case SP_ATTR_INKSCAPE_LABEL:
         if (value) {
+            if (guide->label) {
+                g_free(guide->label);
+            }
             guide->label = g_strdup(value);
         } else {
+            if (guide->label) {
+                g_free(guide->label);
+            }
             guide->label = NULL;
         }
 

=== modified file 'src/ui/dialog/guides.cpp'
--- src/ui/dialog/guides.cpp	2012-04-28 15:49:30 +0000
+++ src/ui/dialog/guides.cpp	2012-07-30 18:23:24 +0000
@@ -118,8 +118,9 @@
 
     sp_guide_moveto(*_guide, newpos, true);
 
-    const gchar* name = _label_entry.getEntry()->get_text().c_str();
+    const gchar* name = g_strdup(_label_entry.getEntry()->get_text().c_str());
     sp_guide_set_label(*_guide, name, true);
+    g_free((gpointer) name);
 
     DocumentUndo::done(_guide->document, SP_VERB_NONE, 
                        _("Set guide properties"));