diff --git a/Version b/Version
index 3d9e005e6ec72bb40481a543d6e420e7e3c285ec..f5b1054abc9bd5d287b1af4973585dcb3467c12a 100644
--- a/Version
+++ b/Version
@@ -1,4 +1,4 @@
-; > Versions.Vicky
+; > Version
 
         GET     VersionASM
 
@@ -14,13 +14,13 @@ Version SETA    Module_Version
 VString SETS    Module_MajorVersion
 Date    SETS    Module_Date      ; version for STB/NC OS
         |
-Version SETA    517
-VString SETS    "5.17"
+Version SETA    518
+VString SETS    "5.18"
    [ (Version :AND: 1) = 1
 Date    SETS    Module_Date      ; Odd-numbered (i.e. development) build, use
-                                 ; date of last source checkin
+                                 ; date of last source check in
    |
-Date    SETS    "19 Jan 2010"    ; version for RISC OS on desktop computers
+Date    SETS    "16 Jan 2012"    ; version for RISC OS on desktop computers
                                  ; Desktop and Switcher use this via OS_Byte 0
    ]
         ]
diff --git a/VersionASM b/VersionASM
index 23dfddcf84af0885e61a2b2e2ab1faeb6b29972a..8cf3daec9667f18a6893d1b15dc8ec59e111d960 100644
--- a/VersionASM
+++ b/VersionASM
@@ -13,11 +13,11 @@
                         GBLS    Module_ComponentPath
 Module_MajorVersion     SETS    "5.35"
 Module_Version          SETA    535
-Module_MinorVersion     SETS    "4.79.2.130"
-Module_Date             SETS    "10 Dec 2011"
-Module_ApplicationDate  SETS    "10-Dec-11"
+Module_MinorVersion     SETS    "4.79.2.131"
+Module_Date             SETS    "05 Jan 2012"
+Module_ApplicationDate  SETS    "05-Jan-12"
 Module_ComponentName    SETS    "Kernel"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/Kernel"
-Module_FullVersion      SETS    "5.35 (4.79.2.130)"
-Module_HelpVersion      SETS    "5.35 (10 Dec 2011) 4.79.2.130"
+Module_FullVersion      SETS    "5.35 (4.79.2.131)"
+Module_HelpVersion      SETS    "5.35 (05 Jan 2012) 4.79.2.131"
                         END
diff --git a/VersionNum b/VersionNum
index c01f60f98b13610161ecf7c7375672867e1a4fa0..918188cf5c9a22f94e796e14931c8136ab83b389 100644
--- a/VersionNum
+++ b/VersionNum
@@ -5,19 +5,19 @@
  *
  */
 #define Module_MajorVersion_CMHG        5.35
-#define Module_MinorVersion_CMHG        4.79.2.130
-#define Module_Date_CMHG                10 Dec 2011
+#define Module_MinorVersion_CMHG        4.79.2.131
+#define Module_Date_CMHG                05 Jan 2012
 
 #define Module_MajorVersion             "5.35"
 #define Module_Version                  535
-#define Module_MinorVersion             "4.79.2.130"
-#define Module_Date                     "10 Dec 2011"
+#define Module_MinorVersion             "4.79.2.131"
+#define Module_Date                     "05 Jan 2012"
 
-#define Module_ApplicationDate          "10-Dec-11"
+#define Module_ApplicationDate          "05-Jan-12"
 
 #define Module_ComponentName            "Kernel"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Kernel"
 
-#define Module_FullVersion              "5.35 (4.79.2.130)"
-#define Module_HelpVersion              "5.35 (10 Dec 2011) 4.79.2.130"
+#define Module_FullVersion              "5.35 (4.79.2.131)"
+#define Module_HelpVersion              "5.35 (05 Jan 2012) 4.79.2.131"
 #define Module_LibraryVersionInfo       "5:35"
diff --git a/hdr/Options b/hdr/Options
index 5b0a9befb15c6270e972cc76fb8a2e3aea0b6b88..ec2d8bf733f509430d2ede5cb352c33fcb13cc3e 100644
--- a/hdr/Options
+++ b/hdr/Options
@@ -115,8 +115,8 @@ Select16BitSound SETL   {TRUE}
                 GBLL    Japanese16BitSound
 Japanese16BitSound SETL {TRUE} :LAND: STB
 
-                GBLL   ChecksumCMOS
-ChecksumCMOS    SETL   {TRUE}
+                GBLL    ChecksumCMOS
+ChecksumCMOS    SETL    {TRUE}
 
                 GBLL    SqueezeMods     ; whether squeezed modules are allowed
 SqueezeMods     SETL    {TRUE}
@@ -176,7 +176,7 @@ LateAborts      SETL    {TRUE}
 ShrinkableDAs   SETL    {TRUE}
 
                 GBLL    DA_Batman               ; Holey dynamic areas Batman!
-DA_Batman       SETL {TRUE}                     ; concept of sparsely mapped dynamic areas introduced for Ursula
+DA_Batman       SETL    {TRUE}                  ; concept of sparsely mapped dynamic areas introduced for Ursula
 
                 GBLL    ShadowROM               ; if true, the ROM is mirrored above
 ShadowROM       SETL    {FALSE}                 ; &FF800000