Index: wikitools.admin.inc
===================================================================
--- wikitools.admin.inc (revision 178)
+++ wikitools.admin.inc (working copy)
@@ -151,12 +151,12 @@
     $n1_title = 'n1.title';
     $n2_title = 'n2.title';
     if (wikitools_treat_underscore_as_space()) {
-      $n1_title = 'REPLACE('. $n1_title .', "_", " ")';
-      $n2_title = 'REPLACE('. $n2_title .', "_", " ")';
+      $n1_title = 'REPLACE('. $n1_title .', \'_\', \' \')';
+      $n2_title = 'REPLACE('. $n2_title .', \'_\', \' \')';
     }
     if (wikitools_treat_dash_as_space()) {
-      $n1_title = 'REPLACE('. $n1_title .', "-", " ")';
-      $n2_title = 'REPLACE('. $n2_title .', "-", " ")';
+      $n1_title = 'REPLACE('. $n1_title .', \'-\', \' \')';
+      $n2_title = 'REPLACE('. $n2_title .', \'-\', \' \')';
     }

     // Grab all nodes that have the same title