Index: /trunk/src/org/openstreetmap/josm/actions/ImageryAdjustAction.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/actions/ImageryAdjustAction.java	(revision 10663)
+++ /trunk/src/org/openstreetmap/josm/actions/ImageryAdjustAction.java	(revision 10664)
@@ -225,5 +225,5 @@
             String ostr = tOffset.getText();
             int semicolon = ostr.indexOf(';');
-            if (semicolon >= 0 && semicolon + 1 < ostr.length()) {
+            if (layer != null && semicolon >= 0 && semicolon + 1 < ostr.length()) {
                 try {
                     // here we assume that Double.parseDouble() needs '.' as a decimal separator