Ragdoll.SetPosition takes platforms into account if the character isn't ignoring platforms (i.e. forcing a character on top of a platform won't make it fall through it), reaching the top/bottom of a ladder won't make networkplayers fall off, server ignores position updates from dead/unconscious characters, smaller ResetRagdollDistance

Subsurface/Source/Characters/Animation/HumanoidAnimController.cs

@@ -814,15 +814,12 @@ namespace Barotrauma
             }
             else
             {
-                notClimbing = Math.Abs(targetMovement.X) > 0.05f;
+                notClimbing = Math.Abs(targetMovement.X) > 0.05f ||
+                (TargetMovement.Y < 0.0f && ConvertUnits.ToSimUnits(trigger.Height) + handPos.Y < HeadPosition) ||
+                (TargetMovement.Y > 0.0f && handPos.Y > 0.1f);
             }
 
-            //stop climbing if:
-            //   - moving sideways
-            //   - reached the top or bottom of the ladder
-            if (notClimbing ||
-                (TargetMovement.Y < 0.0f && ConvertUnits.ToSimUnits(trigger.Height) + handPos.Y < HeadPosition) ||
-                (TargetMovement.Y > 0.0f && handPos.Y > 0.1f))
+            if (notClimbing)
             {
                 Anim = Animation.None;
                 character.SelectedConstruction = null;

Subsurface/Source/Characters/Animation/Ragdoll.cs

@@ -793,7 +793,10 @@ namespace Barotrauma
 
             if (original != simPosition)
             {
-                Body body = Submarine.CheckVisibility(original, simPosition);
+                Category collisionCategory = Physics.CollisionWall | Physics.CollisionLevel;
+                if (!ignorePlatforms) collisionCategory |= Physics.CollisionPlatform;
+
+                Body body = Submarine.PickBody(original, simPosition, null, collisionCategory);
             
                 //if there's something in between the limbs
                 if (body != null)
@@ -803,13 +806,10 @@ namespace Barotrauma
                 }
             }
 
-
-
             if (lerp)
             {
                 limb.body.TargetPosition = movePos;
-                limb.body.MoveToTargetPosition(Vector2.Distance(limb.SimPosition, movePos) < 10.0f);
-                
+                limb.body.MoveToTargetPosition(Vector2.Distance(limb.SimPosition, movePos) < 10.0f);                
             }
             else
             {

Subsurface/Source/Characters/Character.cs

@@ -1602,6 +1602,7 @@ namespace Barotrauma
                             GameServer.Log(Name + " selected " + pickedItem.Name, Color.Orange);
                         }
                         pickedItem.Pick(this, false, pickHit, actionHit);
+
                     }
 
                     return;
@@ -1732,6 +1733,8 @@ namespace Barotrauma
                         return;
                     }
 
+                    if (GameMain.Server != null && (isDead || IsUnconscious)) return;
+
                     keys[(int)InputType.Use].Held = actionKeyState;
                     keys[(int)InputType.Use].SetState(false, actionKeyState);
 

Subsurface/Source/Items/Item.cs

@@ -1301,14 +1301,19 @@ namespace Barotrauma
 
             System.Diagnostics.Debug.WriteLine("Item.Pick(" + picker + ", " + forceSelectKey + ")");
 
-            if (picker.SelectedConstruction == this)
+            if (selected)
             {
-                if (picker.IsKeyHit(InputType.Select)) picker.SelectedConstruction = null;
-            }
-            else if (selected)
-            {        
-                picker.SelectedConstruction = this;
+                if (picker.SelectedConstruction == this)
+                {
+                    picker.SelectedConstruction = null;
+                }
+                else
+                {
+                    picker.SelectedConstruction = this;
+                }
             }
+
+
             
             if (!hasRequiredSkills && Character.Controlled==picker && Screen.Selected != GameMain.EditMapScreen)
             {

Subsurface/Source/Map/Submarine.cs

@@ -383,12 +383,18 @@ namespace Barotrauma
                     fixture.CollisionCategories == Category.None || 
                     fixture.CollisionCategories == Physics.CollisionItem) return -1;
 
-                if (collisionCategory != null && !fixture.CollisionCategories.HasFlag((Category)collisionCategory)) return -1;
+                if (collisionCategory != null && 
+                    !fixture.CollisionCategories.HasFlag((Category)collisionCategory) &&
+                    !((Category)collisionCategory).HasFlag(fixture.CollisionCategories)) return -1;
       
                 if (ignoredBodies != null && ignoredBodies.Contains(fixture.Body)) return -1;
-
+                
                 Structure structure = fixture.Body.UserData as Structure;                
-                if (structure != null && (structure.IsPlatform || !structure.HasBody)) return -1;
+                if (structure != null)
+                {
+                    if (!structure.HasBody) return -1;
+                    if (structure.IsPlatform && collisionCategory != null && !((Category)collisionCategory).HasFlag(Physics.CollisionPlatform)) return -1;
+                }                    
 
                 if (fraction < closestFraction)
                 {

Subsurface/Source/Networking/NetConfig.cs

@@ -17,7 +17,7 @@
 
         //if a ragdoll is further than this from the correct position, teleport it there
         //(in sim units)
-        public const float ResetRagdollDistance = 2.0f;
+        public const float ResetRagdollDistance = 1.0f;
 
         //if the ragdoll is closer than this, don't try to correct its position
         public const float AllowedRagdollDistance = 0.1f;