diff --git a/Memory.xml b/Memory.xml
index 15bb900b8..50f141d7f 100644
--- a/Memory.xml
+++ b/Memory.xml
@@ -2145,7 +2145,10 @@
             BLAH!
         </Offsets>
     </Version>
-
+    <Version name="v0.31.24 SDL" os="windows" base="v0.31.23 SDL">
+        <PETimeStamp value="0x4D8F39F9" />
+        <MD5 value="eddc258fa59c89481516ad96eb51b35b" />
+    </Version>
                             .-"""-.
                            '       \
                           |,.  ,-.  |   _________________________
diff --git a/package/ubuntu-10.10/postinst b/package/ubuntu-10.10/postinst
index a628ada3f..ed50fde48 100755
--- a/package/ubuntu-10.10/postinst
+++ b/package/ubuntu-10.10/postinst
@@ -3,5 +3,11 @@ echo "Setting required kernel parameters."
 # I actually do it three times, hoping to hammer this into Ubuntu's dense skull.
 sysctl -w kernel.randomize_va_space=0
 sysctl -w kernel.yama.ptrace_scope=0
-echo "kernel.randomize_va_space=0" >> /etc/sysctl.conf
-echo "kernel.yama.ptrace_scope=0" >> /etc/sysctl.conf
\ No newline at end of file
+if grep -q "kernel.yama.ptrace_scope=0" /etc/sysctl.conf
+then
+  echo "Already installed into /etc/sysctl.conf, doing nothing."
+else
+  echo "kernel.randomize_va_space=0" >> /etc/sysctl.conf
+  echo "kernel.yama.ptrace_scope=0" >> /etc/sysctl.conf
+fi
+
diff --git a/package/ubuntu-10.10/preinst b/package/ubuntu-10.10/preinst
index b194ee6c6..13f47935d 100755
--- a/package/ubuntu-10.10/preinst
+++ b/package/ubuntu-10.10/preinst
@@ -1,3 +1,2 @@
 #!/bin/sh
-mkdir -p /usr/share/dfhack/doc
-mkdir -p /usr/share/dfhack
\ No newline at end of file
+