diff --git a/DIST/with-mdc.deploy b/DIST/with-mdc.deploy
index 8d4619b..93cf000 100644
--- a/DIST/with-mdc.deploy
+++ b/DIST/with-mdc.deploy
@@ -4,8 +4,8 @@ faddenSoft
 http://www.faddensoft.com/
 CiderPress
 http://a2ciderpress.com/
-4.0.2
-43000
+4.0.3-a1
+43038
 C:\DATA\faddenSoft\fs.ico
 Copyright © 2017 CiderPress project authors.  All rights reserved.
 C:\Src\CiderPress\DIST\ReadMe.txt
@@ -357,7 +357,7 @@ FALSE
 4095
 
 
-Setup402.exe
+Setup403-a1.exe
 
 FALSE
 
diff --git a/app/MyApp.h b/app/MyApp.h
index 84936c5..ff5d001 100644
--- a/app/MyApp.h
+++ b/app/MyApp.h
@@ -14,8 +14,8 @@
 /* CiderPress version numbers */
 #define kAppMajorVersion    4
 #define kAppMinorVersion    0
-#define kAppBugVersion      2
-#define kAppDevString       L""
+#define kAppBugVersion      3
+#define kAppDevString       L"-a1"
 
 /*
  * Windows application object.
diff --git a/diskimg/DiskImg.cpp b/diskimg/DiskImg.cpp
index 655f263..bcf4e8f 100644
--- a/diskimg/DiskImg.cpp
+++ b/diskimg/DiskImg.cpp
@@ -472,7 +472,7 @@ DIError DiskImg::OpenImage(DiskImg* pParent, long firstBlock, long numBlocks)
      * already have an open file with specific characteristics.
      */
     //fOffset = pParent->fOffset + kBlockSize * firstBlock;
-    fLength = numBlocks * kBlockSize;
+    fLength = (di_off_t)numBlocks * kBlockSize;
     fOuterLength = fWrappedLength = fLength;
     fFileFormat = kFileFormatUnadorned;
     fPhysical = pParent->fPhysical;
diff --git a/diskimg/DiskImg.h b/diskimg/DiskImg.h
index de65051..78d81b9 100644
--- a/diskimg/DiskImg.h
+++ b/diskimg/DiskImg.h
@@ -45,7 +45,7 @@ namespace DiskImgLib {
 /* compiled-against versions; call DiskImg::GetVersion for linked-against */
 #define kDiskImgVersionMajor    5
 #define kDiskImgVersionMinor    0
-#define kDiskImgVersionBug      0
+#define kDiskImgVersionBug      1
 
 
 /*