diff --git a/VERSION b/VERSION
index d7198d21..cfebf753 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.3.438
+8.3.439
diff --git a/cif/CIFrdtech.c b/cif/CIFrdtech.c
index 8fb76378..08121d62 100644
--- a/cif/CIFrdtech.c
+++ b/cif/CIFrdtech.c
@@ -872,10 +872,20 @@ CIFReadTechLine(sectionName, argc, argv)
 		goto wrongNumArgs;
 	}
 	CIFParseReadLayers(argv[1], &mask, TRUE);
-	for (i=0; i<MAXCIFRLAYERS; i+=1)
+	for (i = 0; i < MAXCIFRLAYERS; i++)
 	{
-	    if (TTMaskHasType(&mask,i))
+	    if (TTMaskHasType(&mask, i))
 	    {
+		/* Only one magic type can be assigned to a GDS layer, so
+		 * multiple assignments should be flagged as errors.
+		 */
+	     	if (cifCurReadStyle->crs_labelLayer[i] != TT_SPACE)
+		    TechError("Labels on layer \"%s\" attached to \"%s\" supersedes "
+				"prior attachment to \"%s\".\n",
+				cifReadLayers[i],
+				DBTypeLongNameTbl[cifCurReadLayer->crl_magicType],
+				DBTypeLongNameTbl[cifCurReadStyle->crs_labelLayer[i]]);
+
 		cifCurReadStyle->crs_labelLayer[i]
 			= cifCurReadLayer->crl_magicType;
 		if (argc == 3)
@@ -899,8 +909,8 @@ CIFReadTechLine(sectionName, argc, argv)
 	if (argc != 2) goto wrongNumArgs;
 	CIFParseReadLayers(argv[1], &mask, TRUE);
 	/* trash the value in crs_labelLayer so that any labels on this
-	   layer get junked, also. dcs 4/11/90
-        */
+	 * layer get junked, also. dcs 4/11/90
+         */
 	for (i=0; i < cifNReadLayers; i++)
 	{
 	     if (TTMaskHasType(&mask,i))
diff --git a/commands/CmdAB.c b/commands/CmdAB.c
index 856d1ba3..5dfff66f 100644
--- a/commands/CmdAB.c
+++ b/commands/CmdAB.c
@@ -50,7 +50,7 @@ static char rcsid[] __attribute__ ((unused)) = "$Header: /usr/cvsroot/magic-8.0/
  * CmdAddPath --
  *
  * Implement the "addpath" command:  append to the global cell search path.
- * (Usage superceded by extended "path" command; retained for compatibility)
+ * (Usage superseded by extended "path" command; retained for compatibility)
  *
  * Usage:
  *	addpath path
diff --git a/commands/CmdLQ.c b/commands/CmdLQ.c
index 13d66eb9..283d2381 100644
--- a/commands/CmdLQ.c
+++ b/commands/CmdLQ.c
@@ -785,7 +785,7 @@ CmdMove(w, cmd)
 	 * box exists.
          * If no selection exists, but the box does, then move the box
          * anyway (hace 10/8/97)
-	 * The above method is superceded by "box move <dir> <dist>"
+	 * The above method is superseded by "box move <dir> <dist>"
 	 * but is retained for backward compatibility.
 	 */
 
diff --git a/extract/ExtBasic.c b/extract/ExtBasic.c
index c85b2d04..5193c61e 100644
--- a/extract/ExtBasic.c
+++ b/extract/ExtBasic.c
@@ -3490,16 +3490,10 @@ extTransPerimFunc(bp)
 		    }
 		}
 		else
-		{
-		    /* Do not generate error messages on "Ignore" or "Short"
-		     * device types
+		    /* Do not print error messages here, as errors may
+		     * be resolved when checking the next device entry.
 		     */
-		    if (strcmp(extTransRec.tr_devrec->exts_deviceName, "Ignore") &&
-				strcmp(extTransRec.tr_devrec->exts_deviceName, "Short"))
-			TxError("Warning:  Unexpected asymmetric device at %d, %d!\n",
-				bp->b_outside->ti_ll.p_x, bp->b_outside->ti_ll.p_y);
 		    break;
-		}
 
 		/* Add the length to this terminal's perimeter */
 		extTransRec.tr_termlen[thisterm] += len;