Index: class.doc
==================================================================
--- class.doc
+++ class.doc
@@ -1793,15 +1793,15 @@
 bit27 *
   Allows hitting to the right regardless of Shape, Volume, etc. In order
   to actually move when sliding to the right, both bit25 and bit27 must
   be set, and bit7 must be clear.
 
-bit28
-  Available for your own use.
+bit28 *
+  Reserved for future.
 
-bit29
-  Available for your own use.
+bit29 *
+  Reserved for future.
 
 bit30
   Available for your own use.
 
 bit31

Index: exec.c
==================================================================
--- exec.c
+++ exec.c
@@ -777,16 +777,16 @@
         oE=objects[objE];
         if(oE->height>0) {
           hit&=0xFC287000;
           v=send_message(objE,obj,MSG_HIT,NVALUE(oE->x),NVALUE(oE->y),NVALUE(hit));
           if(v.t) Throw("Type mismatch in HIT/HITBY");
-          hit|=v.u&(classes[o->class]->cflags&CF_COMPATIBLE?0xF0098F7F:-1);
+          hit|=v.u&(classes[o->class]->cflags&CF_COMPATIBLE?0xC0098F7F:-1);
           if(hit&8) goto fail;
           if(!(hit&0x11)) {
             v=send_message(obj,objE,MSG_HITBY,NVALUE(o->x),NVALUE(o->y),NVALUE(hit));
             if(v.t) Throw("Type mismatch in HIT/HITBY");
-            hit|=v.u&(classes[oE->class]->cflags&CF_COMPATIBLE?0xF0098F7F:-1);
+            hit|=v.u&(classes[oE->class]->cflags&CF_COMPATIBLE?0xC0098F7F:-1);
             if(hit&8) goto fail;
           }
         }
         objE=obj_below(objE);
       }
@@ -844,16 +844,16 @@
       if(oE->height>0) {
         hit&=~7;
         // HIT/HITBY messages
         v=send_message(objE,obj,MSG_HIT,NVALUE(oE->x),NVALUE(oE->y),NVALUE(hit));
         if(v.t) Throw("Type mismatch in HIT/HITBY");
-        hit|=v.u&(classes[o->class]->cflags&CF_COMPATIBLE?0xF0098F7F:-1);
+        hit|=v.u&(classes[o->class]->cflags&CF_COMPATIBLE?0xC0098F7F:-1);
         if(hit&8) goto fail;
         if(!(hit&0x11)) {
           v=send_message(obj,objE,MSG_HITBY,NVALUE(o->x),NVALUE(o->y),NVALUE(hit));
           if(v.t) Throw("Type mismatch in HIT/HITBY");
-          hit|=v.u&(classes[oE->class]->cflags&CF_COMPATIBLE?0xF0098F7F:-1);
+          hit|=v.u&(classes[oE->class]->cflags&CF_COMPATIBLE?0xC0098F7F:-1);
         }
         if(hit&0x108) goto fail;
         // Hardness/sharpness
         if(!(hit&0x22)) {
           if(o->sharp[dir>>1]>oE->hard[(dir^4)>>1] && !v_bool(destroy(obj,objE,2))) hit|=0x8004;
@@ -890,16 +890,16 @@
         if(oE->height>0) {
           hit&=~7;
           // HIT/HITBY messages
           v=send_message(objE,obj,MSG_HIT,NVALUE(oE->x),NVALUE(oE->y),NVALUE(hit));
           if(v.t) Throw("Type mismatch in HIT/HITBY");
-          hit|=v.u&(classes[o->class]->cflags&CF_COMPATIBLE?0xF0098F7F:-1);
+          hit|=v.u&(classes[o->class]->cflags&CF_COMPATIBLE?0xC0098F7F:-1);
           if(hit&8) goto otherside;
           if(!(hit&0x11)) {
             v=send_message(obj,objE,MSG_HITBY,NVALUE(o->x),NVALUE(o->y),NVALUE(hit));
             if(v.t) Throw("Type mismatch in HIT/HITBY");
-            hit|=v.u&(classes[oE->class]->cflags&CF_COMPATIBLE?0xF0098F7F:-1);
+            hit|=v.u&(classes[oE->class]->cflags&CF_COMPATIBLE?0xC0098F7F:-1);
           }
           if(hit&0x108) goto otherside;
           // Hardness/sharpness
           if(!(hit&0x22)) {
             if(o->sharp[dir>>1]>oE->hard[(dir^4)>>1] && !v_bool(destroy(obj,objE,2))) hit|=0x8004;
@@ -925,16 +925,16 @@
         if(oE->height>0) {
           hit&=~7;
           // HIT/HITBY messages
           v=send_message(objE,obj,MSG_HIT,NVALUE(oE->x),NVALUE(oE->y),NVALUE(hit));
           if(v.t) Throw("Type mismatch in HIT/HITBY");
-          hit|=v.u&(classes[o->class]->cflags&CF_COMPATIBLE?0xF0098F7F:-1);
+          hit|=v.u&(classes[o->class]->cflags&CF_COMPATIBLE?0xC0098F7F:-1);
           if(hit&8) goto fail;
           if(!(hit&0x11)) {
             v=send_message(obj,objE,MSG_HITBY,NVALUE(o->x),NVALUE(o->y),NVALUE(hit));
             if(v.t) Throw("Type mismatch in HIT/HITBY");
-            hit|=v.u&(classes[oE->class]->cflags&CF_COMPATIBLE?0xF0098F7F:-1);
+            hit|=v.u&(classes[oE->class]->cflags&CF_COMPATIBLE?0xC0098F7F:-1);
           }
           if(hit&0x108) goto fail;
           // Hardness/sharpness
           if(!(hit&0x22)) {
             if(o->sharp[dir>>1]>oE->hard[(dir^4)>>1] && !v_bool(destroy(obj,objE,2))) hit|=0x8004;