--- old/src/macosx/classes/sun/lwawt/macosx/CDataTransferer.java	2012-07-19 19:09:05.000000000 +0400
+++ new/src/macosx/classes/sun/lwawt/macosx/CDataTransferer.java	2012-07-19 19:09:05.000000000 +0400
@@ -182,6 +182,10 @@
         Long format = predefinedClipboardNameMap.get(str);
 
         if (format == null) {
+            if (java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment().isHeadlessInstance()) {
+                // Do not try to access GUI manager for unknown format
+                return new Long(-1);
+            }
             format = new Long(registerFormatWithPasteboard(str));
             predefinedClipboardNameMap.put(str, format);
             predefinedClipboardFormatMap.put(format, str);