Index: /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceUtils.cpp
===================================================================
--- /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceUtils.cpp	(revision 23576)
+++ /trunk/src/VBox/Additions/common/VBoxService/VBoxServiceUtils.cpp	(revision 23577)
@@ -45,11 +45,11 @@
         if (pszValueFormat != NULL)
         {
+            VBoxServiceVerbose(3, "Writing guest property \"%s\"\n", pszNameUTF8);
             va_list va;
             va_start(va, pszValueFormat);
-            VBoxServiceVerbose(3, "Writing guest property \"%s\"=\"%s\"\n", pszNameUTF8, pszValueFormat);
             rc = VbglR3GuestPropWriteValueV(u32ClientId, pszNameUTF8, pszValueFormat, va);
+            va_end(va);
             if (RT_FAILURE(rc))
-                 VBoxServiceError("Error writing guest property \"%s\"=\"%s\" (rc=%Rrc)\n", pszNameUTF8, pszValueFormat, rc);
-            va_end(va);
+                 VBoxServiceError("Error writing guest property \"%s\" (rc=%Rrc)\n", pszNameUTF8, rc);
         }
         else