diff -r 9402221f77dd -r 0b1183012a3c src/Pure/ROOT
--- a/src/Pure/ROOT	Wed May 15 17:39:41 2013 +0200
+++ b/src/Pure/ROOT	Wed May 15 20:22:46 2013 +0200
@@ -160,7 +160,6 @@
     "Proof/proof_rewrite_rules.ML"
     "Proof/proof_syntax.ML"
     "Proof/reconstruct.ML"
-    "ProofGeneral/preferences.ML"
     "ProofGeneral/proof_general.ML"
     "ROOT.ML"
     "Syntax/ast.ML"