diff --git a/src/com/bytezone/diskbrowser/pascal/CatalogEntry.java b/src/com/bytezone/diskbrowser/pascal/CatalogEntry.java
index 015a758..681993d 100644
--- a/src/com/bytezone/diskbrowser/pascal/CatalogEntry.java
+++ b/src/com/bytezone/diskbrowser/pascal/CatalogEntry.java
@@ -29,7 +29,8 @@ abstract class CatalogEntry implements AppleFileSource
 
     firstBlock = HexFormatter.intValue (buffer[0], buffer[1]);
     lastBlock = HexFormatter.intValue (buffer[2], buffer[3]);
-    fileType = HexFormatter.intValue (buffer[4], buffer[5]);
+    //    fileType = HexFormatter.intValue (buffer[4], buffer[5]);
+    fileType = buffer[4] & 0xFF;
     name = HexFormatter.getPascalString (buffer, 6);
     bytesUsedInLastBlock = HexFormatter.intValue (buffer[16], buffer[17]);
 
@@ -71,6 +72,8 @@ abstract class CatalogEntry implements AppleFileSource
   public String toString ()
   {
     int size = lastBlock - firstBlock;
-    return String.format ("%03d  %s  %-15s", size, parent.fileTypes[fileType], name);
+    String fileTypeText = fileType < 0 || fileType >= parent.fileTypes.length ? "????"
+        : parent.fileTypes[fileType];
+    return String.format ("%03d  %s  %-15s", size, fileTypeText, name);
   }
 }
\ No newline at end of file
diff --git a/src/com/bytezone/diskbrowser/pascal/PascalDisk.java b/src/com/bytezone/diskbrowser/pascal/PascalDisk.java
index bbd6fd2..7949d51 100755
--- a/src/com/bytezone/diskbrowser/pascal/PascalDisk.java
+++ b/src/com/bytezone/diskbrowser/pascal/PascalDisk.java
@@ -264,9 +264,10 @@ public class PascalDisk extends AbstractFormattedDisk
       usedBlocks += size;
       date = ce.date == null ? "--" : df.format (ce.date.getTime ());
       int bytes = (size - 1) * 512 + ce.bytesUsedInLastBlock;
+      String fileType = ce.fileType < 0 || ce.fileType >= fileTypes.length ? "????"
+          : fileTypes[ce.fileType];
       text.append (String.format ("%4d   %-15s   %s   %8s %,8d   $%03X   $%03X   $%03X%n",
-          size, ce.name, fileTypes[ce.fileType], date, bytes, ce.firstBlock, ce.lastBlock,
-          size));
+          size, ce.name, fileType, date, bytes, ce.firstBlock, ce.lastBlock, size));
     }
     text.append (line);
     text.append (
diff --git a/src/com/bytezone/diskbrowser/utilities/Utility.java b/src/com/bytezone/diskbrowser/utilities/Utility.java
index b8e91a2..1cb3ad8 100644
--- a/src/com/bytezone/diskbrowser/utilities/Utility.java
+++ b/src/com/bytezone/diskbrowser/utilities/Utility.java
@@ -9,7 +9,7 @@ import java.util.List;
 public class Utility
 {
   public static final List<String> suffixes =
-      Arrays.asList ("po", "dsk", "do", "hdv", "2mg", "v2d", "nib", "d13", "sdk");
+      Arrays.asList ("po", "dsk", "do", "hdv", "2mg", "v2d", "d13", "sdk");
 
   // not used - it doesn't work with Oracle's JDK
   private static boolean hasRetinaDisplay ()