diff --git a/src/Client/World/MapMgr.cpp b/src/Client/World/MapMgr.cpp
index 2a93e5b..4563ee4 100644
--- a/src/Client/World/MapMgr.cpp
+++ b/src/Client/World/MapMgr.cpp
@@ -33,14 +33,12 @@ void MapMgr::Update(float x, float y, uint32 m)
         _mapid = m;
         _gridx = _gridy = (-1); // must load tiles now
     }
-    uint32 xg,yg; // MapTile IDs. Range 0..64
-    xg = GetGridCoord(x);
-    yg = GetGridCoord(y);
-    if(xg != _gridx || yg != _gridy)
+    GridCoordPair gcoords = GetTransformGridCoordPair(x,y);
+    if(gcoords.x != _gridx || gcoords.y != _gridy)
     {
-        _LoadNearTiles(xg,yg,m);
-        _gridx = xg;
-        _gridy = yg;
+        _LoadNearTiles(gcoords.x,gcoords.y,m);
+        _gridx = gcoords.x;
+        _gridy = gcoords.y;
         _UnloadOldTiles();
     }
     _mapid = m;
@@ -145,6 +143,11 @@ uint32 MapMgr::GetGridCoord(float f)
     return (ZEROPOINT - f) / TILESIZE;
 }
 
+GridCoordPair MapMgr::GetTransformGridCoordPair(float x, float y)
+{
+    return GridCoordPair(GetGridCoord(y), GetGridCoord(x)); // i have no idea why they are swapping x and y map coords in ADT files...
+}
+
 uint32 MapMgr::GetLoadedMapsCount(void)
 {
     uint32 counter = 0;
@@ -160,10 +163,9 @@ uint32 MapMgr::GetLoadedMapsCount(void)
 
 float MapMgr::GetZ(float x, float y)
 {
-    uint32 xg,yg; // MapTile IDs. Range 0..64
-    xg = GetGridCoord(x);
-    yg = GetGridCoord(y);
-    MapTile *tile = _tiles->GetTile(xg,yg);
+    return -99999.0f; // for now return lowest possible number, GetZ() will be implemented correctly later
+/*    GridCoordPair gcoords = GetTransformGridCoordPair(x,y);
+    MapTile *tile = _tiles->GetTile(gcoords.x,gcoords.y);
     if(tile)
     {
 #ifdef _DEBUG
@@ -173,7 +175,7 @@ float MapMgr::GetZ(float x, float y)
         return tile->GetZ(x,y);
     }
 
-    logerror("MapMgr::GetZ() called for not loaded MapTile (%u, %u) for (%f, %f)",xg,yg,x,y);
-    return 0;
+    logerror("MapMgr::GetZ() called for not loaded MapTile (%u, %u) for (%f, %f)",gcoords.x,gcoords.y,x,y);
+    return 0;*/
 }
  
diff --git a/src/Client/World/MapMgr.h b/src/Client/World/MapMgr.h
index 20b7982..6e71af3 100644
--- a/src/Client/World/MapMgr.h
+++ b/src/Client/World/MapMgr.h
@@ -4,6 +4,14 @@
 class MapTileStorage;
 class MapTile;
 
+struct GridCoordPair
+{
+    GridCoordPair() {}
+    GridCoordPair(uint32 xu, uint32 yu) { x = xu; y = yu; }
+    uint32 x;
+    uint32 y;
+};
+
 class MapMgr
 {
 public:
@@ -12,7 +20,8 @@ public:
     void Update(float,float,uint32);
     void Flush(void);
     float GetZ(float,float);
-    uint32 GetGridCoord(float f);
+    static uint32 GetGridCoord(float f);
+    static GridCoordPair GetTransformGridCoordPair(float x, float y);
     MapTile *GetTile(uint32 xg, uint32 yg, bool forceLoad = false);
     MapTile *GetCurrentTile(void);
     MapTile *GetNearTile(int32, int32);
@@ -21,7 +30,6 @@ public:
     inline uint32 GetGridX(void) { return _gridx; }
     inline uint32 GetGridY(void) { return _gridy; }
 
-
 private:
     MapTileStorage *_tiles;
     void _LoadTile(uint32,uint32,uint32);
diff --git a/src/Client/World/World.cpp b/src/Client/World/World.cpp
index 387f833..552d8af 100644
--- a/src/Client/World/World.cpp
+++ b/src/Client/World/World.cpp
@@ -32,18 +32,21 @@ void World::Clear(void)
 
 void World::Update(void)
 {
+    if(_mapId == uint32(-1)) // to prevent unexpected behaviour
+        return;
+
     if(_mapmgr)
     {
         _mapmgr->Update(_x,_y,_mapId);
     }
 
     // some debug code for testing...
-    if(_mapmgr && _x != _lastx || _y != _lasty)
+    /*if(_mapmgr && _x != _lastx || _y != _lasty)
     {
         logdetail("WORLD: relocation, to x=%f y=%f, calculated z=%f",_x,_y,this->GetPosZ(_x,_y));
         _lastx = _x;
         _lasty = _y;
-    }
+    }*/
         
 }
 
diff --git a/src/shared/MapTile.cpp b/src/shared/MapTile.cpp
index ead0d8a..e5d2375 100644
--- a/src/shared/MapTile.cpp
+++ b/src/shared/MapTile.cpp
@@ -24,8 +24,8 @@ void MapTile::ImportFromADT(ADTFile *adt)
     for(uint32 ch=0; ch<CHUNKS_PER_TILE; ch++)
     {
         _chunks[ch].baseheight = adt->_chunks[ch].hdr.zbase; // ADT files store (x/z) as ground coords and (y) as the height!
-        _chunks[ch].basey = adt->_chunks[ch].hdr.xbase; // here converting it to (x/y) on ground and basehight as actual height.
-        _chunks[ch].basex = adt->_chunks[ch].hdr.ybase; // strange coords they use... :S
+        _chunks[ch].basex = adt->_chunks[ch].hdr.xbase; // here converting it to (x/y) on ground and basehight as actual height.
+        _chunks[ch].basey = adt->_chunks[ch].hdr.ybase; // strange coords they use... :S
         uint32 fcnt=0, rcnt=0;
         while(true) //9*9 + 8*8
         {
@@ -43,6 +43,7 @@ void MapTile::ImportFromADT(ADTFile *adt)
             }
         }
     }
+    DEBUG(logdebug("MapTile first chunk base: h=%f x=%f y=%f",_chunks[0].baseheight,_chunks[0].basex,_chunks[0].basey));
 }
 
 void MapTileStorage::_DebugDump(void)
@@ -65,7 +66,7 @@ void MapTileStorage::_DebugDump(void)
 // TODO: use inner vertices also
 // TODO: interpolate values instead of choosing closest vertex
 // formula taken from BoogieBot, thx!
-float MapTile::GetZ(float x, float y)
+/*float MapTile::GetZ(float x, float y)
 {
     float bx,by;
     bx = _chunks[0].basex; // world base coords of tile
@@ -91,7 +92,7 @@ float MapTile::GetZ(float x, float y)
     float real_z = ch.hmap_rough[vy*9 + vx] + ch.baseheight;
 
     return real_z;
-}
+}*/
 
 void MapTile::DebugDumpToFile(void)
 {