diff --git a/Memory.xml b/Memory.xml
index 1f19a8c4b..bf7507cb4 100644
--- a/Memory.xml
+++ b/Memory.xml
@@ -760,6 +760,7 @@
                     <Offset name="pathfinding" />
                     <Offset name="feature_local" description="Index into a local feature vector (adamantine, etc. Complicated, see source)" />
                     <Offset name="feature_global" description="Index into the global feature vector (hell, etc.)." />
+                    <Offset name="mystery_offset" description="It's a mystery! I mean Kittens!" />
                 </Group>
                 <Group name="features">
                     <Group name="global">
@@ -2095,7 +2096,38 @@
         <PETimeStamp value="0x4D743DA7" />
         <MD5 value="3aadcbd781f7d70d5ee552b92c03bc6b" />
     </Version>
-    
+    <Version name="v0.31.22 SDL" os="windows" base="v0.31.21 SDL" rebase="-0x1CFE0">
+        <PETimeStamp value="0x4D8B30FC" />
+        <MD5 value="e31538a48efcfa6598b15bb938906c6b" />
+        <Offsets>
+            <Group name="Position">
+                <Address name="cursor_xyz" value="0xb337f0" />
+                <Address name="window_dims" value="0xb3407c" />
+                <Address name="window_x" value="0xeaf984" />
+                <Address name="window_y" value="0xeddba0" />
+                <Address name="window_z" value="0xeddb7c" />
+            </Group>
+            <Group name="Maps">
+                <Group name="block">
+                    <!--
+                    <Offset name="vein_vector" value="0x8" />
+                    <Offset name="feature_local" value="0x24" />
+                    <Offset name="feature_global" value="0x28" />
+                    -->
+                    <Offset name="mystery_offset" value="0x2C" />
+                    <Offset name="vegetation_vector" value="0x64" />
+                    <Offset name="type" value="0x7e" />
+                    <Offset name="designation" value="0x280" />
+                    <Offset name="occupancy" value="0x680" />
+                    <Offset name="pathfinding" value="0xd80" />
+                    <Offset name="temperature1" value="0x1580" />
+                    <Offset name="temperature2" value="0x1780" />
+                    <Offset name="biome_stuffs" value="0x1d80" />
+                    -->
+                </Group>
+            </Group>
+        </Offsets>
+    </Version>
                             .-"""-.
                            '       \
                           |,.  ,-.  |   _________________________
diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index 826576259..f40601909 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -184,7 +184,8 @@ SET_TARGET_PROPERTIES(dfhack  PROPERTIES DEBUG_POSTFIX "-debug" )
 
 TARGET_LINK_LIBRARIES(dfhack ${PROJECT_LIBS})
 
-ADD_CUSTOM_COMMAND( TARGET dfhack POST_BUILD
+#ADD_CUSTOM_COMMAND( TARGET dfhack POST_BUILD
+ADD_CUSTOM_TARGET( memxmlcopy ALL
 COMMAND ${CMAKE_COMMAND} -E copy ${dfhack_SOURCE_DIR}/Memory.xml ${dfhack_BINARY_DIR}/bin/${CMAKE_CFG_INTDIR}/)
 
 install(TARGETS dfhack
diff --git a/library/include/dfhack/modules/Maps.h b/library/include/dfhack/modules/Maps.h
index 30945f313..d2fed2ffb 100644
--- a/library/include/dfhack/modules/Maps.h
+++ b/library/include/dfhack/modules/Maps.h
@@ -475,6 +475,7 @@ namespace DFHack
         int16_t global_feature;
         /// index into the local feature vector... complicated
         int16_t local_feature;
+        int32_t mystery;
     } mapblock40d;
 
     class DFContextShared;
diff --git a/library/modules/Maps.cpp b/library/modules/Maps.cpp
index ab8f4d7cc..c4449c3bb 100644
--- a/library/modules/Maps.cpp
+++ b/library/modules/Maps.cpp
@@ -85,6 +85,7 @@ struct Maps::Private
         uint32_t temperature2_offset;
         uint32_t global_feature_offset;
         uint32_t local_feature_offset;
+        uint32_t mystery;
         
         uint32_t vein_mineral_vptr;
         uint32_t vein_ice_vptr;
@@ -198,7 +199,14 @@ Maps::Maps(DFContextShared* _d)
             off.temperature1_offset = OG_MapBlock->getOffset ("temperature1");
             off.temperature2_offset = OG_MapBlock->getOffset ("temperature2");
         }
-
+        try
+        {
+            off.mystery = OG_MapBlock->getOffset ("mystery_offset");
+        }
+        catch(Error::AllMemdef &)
+        {
+            off.mystery = 0;
+        }
         try
         {
             OffsetGroup *OG_Geology = OG_Maps->getGroup("geology");
@@ -314,6 +322,8 @@ bool Maps::Start()
     // test for wrong map dimensions
     if (mx == 0 || mx > 48 || my == 0 || my > 48 || mz == 0)
     {
+        cout << hex << off.x_count_offset << " " << off.y_count_offset << " " << off.z_count_offset << endl;
+        cout << dec << mx << " "<< my << " "<< mz << endl;
         throw Error::BadMapDimensions(mx, my);
         //return false;
     }
@@ -408,6 +418,7 @@ bool Maps::ReadBlock40d(uint32_t x, uint32_t y, uint32_t z, mapblock40d * buffer
         p->read (addr + d->offsets.biome_stuffs, sizeof (biome_indices40d), (uint8_t *) buffer->biome_indices);
         p->readWord(addr + d->offsets.global_feature_offset, (uint16_t&) buffer->global_feature);
         p->readWord(addr + d->offsets.local_feature_offset, (uint16_t&)buffer->local_feature);
+        p->readDWord(addr + d->offsets.mystery, (uint32_t&)buffer->mystery);
         buffer->origin = addr;
         uint32_t addr_of_struct = p->readDWord(addr);
         buffer->blockflags.whole = p->readDWord(addr_of_struct);
diff --git a/tools/supported/probe.cpp b/tools/supported/probe.cpp
index 71d5c15f8..ddbcf8bcf 100644
--- a/tools/supported/probe.cpp
+++ b/tools/supported/probe.cpp
@@ -159,8 +159,10 @@ int main (int numargs, const char ** args)
                     sa_feature(global_features[block.global_feature].type)
                     );
             }
-
             #undef PRINT_FLAG
+            cout << "local feature idx: " << block.local_feature << endl;
+            cout << "global feature idx: " << block.global_feature << endl;
+            cout << "mystery: " << block.mystery << endl;
             std::cout << std::endl;
         }
     }