Index: trunk/src/org/openstreetmap/josm/gui/io/ActionFlagsTableCell.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/io/ActionFlagsTableCell.java	(revision 17307)
+++ trunk/src/org/openstreetmap/josm/gui/io/ActionFlagsTableCell.java	(revision 17308)
@@ -35,4 +35,8 @@
  * <br>col.setCellEditor(aftc);
  * </code>
+ *
+ * Note: Do not use the same object both as <code>TableCellRenderer</code> and
+ * <code>TableCellEditor</code> - this can mess up the current editor component
+ * by subsequent calls to the renderer (#19995 and #12462).
  */
 class ActionFlagsTableCell extends JPanel implements TableCellRenderer, TableCellEditor {
Index: trunk/src/org/openstreetmap/josm/gui/io/SaveLayersTableColumnModel.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/io/SaveLayersTableColumnModel.java	(revision 17307)
+++ trunk/src/org/openstreetmap/josm/gui/io/SaveLayersTableColumnModel.java	(revision 17308)
@@ -90,11 +90,9 @@
     protected void build() {
         // column 0 - layer name, save path editor
-        LayerNameAndFilePathTableCell lnfpRenderer = new LayerNameAndFilePathTableCell();
-        LayerNameAndFilePathTableCell lnfpEditor = new LayerNameAndFilePathTableCell();
         TableColumn col = new TableColumn(0); // keep in sync with SaveLayersModel#columnFilename
         col.setHeaderValue(tr("Layer Name and File Path"));
         col.setResizable(true);
-        col.setCellRenderer(lnfpRenderer);
-        col.setCellEditor(lnfpEditor);
+        col.setCellRenderer(new LayerNameAndFilePathTableCell());
+        col.setCellEditor(new LayerNameAndFilePathTableCell());
         col.setPreferredWidth(324);
         addColumn(col);
@@ -109,10 +107,9 @@
 
         // column 2- actions to take
-        ActionFlagsTableCell aftc = new ActionFlagsTableCell();
         col = new TableColumn(2); // keep in sync with SaveLayersModel#columnActions
         col.setHeaderValue(tr("Actions To Take"));
         col.setResizable(true);
-        col.setCellRenderer(aftc);
-        col.setCellEditor(aftc);
+        col.setCellRenderer(new ActionFlagsTableCell());
+        col.setCellEditor(new ActionFlagsTableCell());
         col.setPreferredWidth(100);