diff --git a/polymer/eduke32/Makefile.common b/polymer/eduke32/Makefile.common
index 44abe42e9..5d502a898 100644
--- a/polymer/eduke32/Makefile.common
+++ b/polymer/eduke32/Makefile.common
@@ -88,7 +88,7 @@ ifneq (0,$(DEBUGANYWAY))
 endif
 
 W_NO_UNUSED_RESULT := $(shell echo '' | $(CC) -E -Wno-unused-result - 2>/dev/null && echo -Wno-unused-result)
-W_NO_UNUSED_RESULT := $(findstring -Wno-unused-result,$(WNO_UNUSED_RESULT))
+W_NO_UNUSED_RESULT := $(findstring -Wno-unused-result,$(W_NO_UNUSED_RESULT))
 
 BASECFLAGS=$(debug) -W -Wall -Wimplicit -Werror-implicit-function-declaration \
 	-funsigned-char -fno-strict-aliasing -DNO_GCC_BUILTINS -D_FORTIFY_SOURCE=2 \
diff --git a/polymer/eduke32/build/include/editor.h b/polymer/eduke32/build/include/editor.h
index f507f2534..9bc23fb95 100644
--- a/polymer/eduke32/build/include/editor.h
+++ b/polymer/eduke32/build/include/editor.h
@@ -114,7 +114,7 @@ extern const char *SaveBoard(const char *fn, uint32_t flags);
 #define CORRUPT_SPRITE (1<<19)
 #define CORRUPT_MASK (CORRUPT_SECTOR|CORRUPT_WALL|CORRUPT_SPRITE)
 #define MAXCORRUPTTHINGS 64
-extern int32_t numcorruptthings, corruptthings[MAXCORRUPTTHINGS];
+extern int32_t corruptlevel, numcorruptthings, corruptthings[MAXCORRUPTTHINGS];
 extern int32_t autocorruptcheck;
 extern int32_t CheckMapCorruption(int32_t printfromlev, int32_t tryfixing);
 
diff --git a/polymer/eduke32/build/src/build.c b/polymer/eduke32/build/src/build.c
index 0d7bea360..4a1a03bac 100644
--- a/polymer/eduke32/build/src/build.c
+++ b/polymer/eduke32/build/src/build.c
@@ -1259,16 +1259,25 @@ static inline void drawline16base(int32_t bx, int32_t by, int32_t x1, int32_t y1
     drawline16(bx+x1, by+y1, bx+x2, by+y2, col);
 }
 
-static void drawsmalllabel(const char *text, char col, char backcol,
-                           int32_t x1, int32_t y1, int32_t x2, int32_t y2)
+static void drawsmalllabel(const char *text, char col, char backcol, int32_t dax, int32_t day)
 {
-    printext16(x1,y1, col,backcol, text,1);
-    drawline16(x1-1,y1-1, x2-3,y1-1, backcol);
-    drawline16(x1-1,y2+1, x2-3,y2+1, backcol);
+    int32_t x1, y1, x2, y2;
 
-    drawline16(x1-2,y1, x1-2,y2, backcol);
-    drawline16(x2-2,y1, x2-2,y2, backcol);
-    drawline16(x2-3,y1, x2-3,y2, backcol);
+    x1 = halfxdim16+dax-(Bstrlen(text)<<1);
+    y1 = midydim16+day-4;
+    x2 = x1 + (Bstrlen(text)<<2)+2;
+    y2 = y1 + 7;
+
+    if ((x1 > 3) && (x2 < xdim) && (y1 > 1) && (y2 < ydim16))
+    {
+        printext16(x1,y1, col,backcol, text,1);
+        drawline16(x1-1,y1-1, x2-3,y1-1, backcol);
+        drawline16(x1-1,y2+1, x2-3,y2+1, backcol);
+
+        drawline16(x1-2,y1, x1-2,y2, backcol);
+        drawline16(x2-2,y1, x2-2,y2, backcol);
+        drawline16(x2-3,y1, x2-3,y2, backcol);
+    }
 }
 
 // backup highlighted sectors with sprites as mapinfo for later restoration
@@ -1944,13 +1953,7 @@ void overheadeditor(void)
                             if (m32_sideview)
                                 day += vdisp;
 
-                            x1 = halfxdim16+dax-(Bstrlen(dabuffer)<<1);
-                            y1 = midydim16+day-4;
-                            x2 = x1 + (Bstrlen(dabuffer)<<2)+2;
-                            y2 = y1 + 7;
-                            if ((x1 > 3) && (x2 < xdim) && (y1 > 1) && (y2 < ydim16))
-                                drawsmalllabel(dabuffer, editorcolors[0], editorcolors[7],
-                                               x1,y1, x2,y2);
+                            drawsmalllabel(dabuffer, editorcolors[0], editorcolors[7], dax, day);
                         }
                     }
                 }
@@ -1985,14 +1988,7 @@ void overheadeditor(void)
                             if (m32_sideview)
                                 day += getscreenvdisp(getflorzofslope(sectorofwall(i), dax,day)-pos.z, zoom);
 
-                            x1 = halfxdim16+dax-(Bstrlen(dabuffer)<<1);
-                            y1 = midydim16+day-4;
-                            x2 = x1 + (Bstrlen(dabuffer)<<2)+2;
-                            y2 = y1 + 7;
-
-                            if ((x1 > 3) && (x2 < xdim) && (y1 > 1) && (y2 < ydim16))
-                                drawsmalllabel(dabuffer, editorcolors[0], editorcolors[31],
-                                               x1,y1, x2,y2);
+                            drawsmalllabel(dabuffer, editorcolors[0], editorcolors[31], dax, day);
                         }
                     }
                 }
@@ -2022,12 +2018,6 @@ void overheadeditor(void)
                                 if (m32_sideview)
                                     day += getscreenvdisp(sprite[i].z-pos.z, zoom);
 
-                                x1 = halfxdim16+dax-(Bstrlen(dabuffer)<<1);
-                                y1 = midydim16+day-4;
-                                x2 = x1 + (Bstrlen(dabuffer)<<2)+2;
-                                y2 = y1 + 7;
-
-                                if ((x1 > 3) && (x2 < xdim) && (y1 > 1) && (y2 < ydim16))
                                 {
                                     int32_t blocking = (sprite[i].cstat&1);
 
@@ -2038,8 +2028,7 @@ void overheadeditor(void)
                                     if ((i == pointhighlight-16384) && (totalclock & 32))
                                         col += (2<<2);
 
-                                    drawsmalllabel(dabuffer, editorcolors[0], editorcolors[col],
-                                                   x1,y1, x2,y2);
+                                    drawsmalllabel(dabuffer, editorcolors[0], editorcolors[col], dax, day);
                                 }
                             }
                             j--;
@@ -2084,16 +2073,24 @@ void overheadeditor(void)
             if (joinsector[0] >= 0)
                 col = editorcolors[11];
 
-            if (numcorruptthings>0 && (pointhighlight&16384)==0)
+            if (numcorruptthings>0)
             {
-                for (i=0; i<numcorruptthings; i++)
-                    if ((corruptthings[i]&CORRUPT_MASK)==CORRUPT_WALL &&
+                static char cbuf[64];
+
+                if ((pointhighlight&16384)==0)
+                {
+                    for (i=0; i<numcorruptthings; i++)
+                        if ((corruptthings[i]&CORRUPT_MASK)==CORRUPT_WALL &&
                             (corruptthings[i]&(MAXWALLS-1))==pointhighlight)
-                    {
-                        col = editorcolors[13];
-                        printext16(searchx+6,searchy-6-8,editorcolors[13],editorcolors[0],"corrupt wall",0);
-                        break;
-                    }
+                        {
+                            col = editorcolors[13];
+                            printext16(searchx+6,searchy-6-8,editorcolors[13],editorcolors[0],"corrupt wall",0);
+                            break;
+                        }
+                }
+
+                Bsprintf(cbuf, "map corrupt (level %d): %d errors", corruptlevel, numcorruptthings);
+                printext16(8,8, editorcolors[13],editorcolors[0],cbuf,0);
             }
 
             if ((keystatus[0x36] || keystatus[0xb8]) && !eitherCTRL)  // RSHIFT || RALT
diff --git a/polymer/eduke32/build/src/engine.c b/polymer/eduke32/build/src/engine.c
index 9e6e4252f..59bb9e2fb 100644
--- a/polymer/eduke32/build/src/engine.c
+++ b/polymer/eduke32/build/src/engine.c
@@ -6186,7 +6186,7 @@ int32_t preinitengine(void)
         dynarray[] =
         {
             { (void **) &sector,           sizeof(sectortype)      *MAXSECTORS                },
-            { (void **) &wall,             sizeof(walltype)        *(MAXWALLS+4)              }, // +4: editor quirks
+            { (void **) &wall,             sizeof(walltype)        *MAXWALLS }, // +1024: editor quirks. FIXME!
             { (void **) &sprite,           sizeof(spritetype)      *MAXSPRITES                },
             { (void **) &tsprite,          sizeof(spritetype)      *MAXSPRITESONSCREEN        },
             { (void **) &spriteext,        sizeof(spriteext_t)     *(MAXSPRITES+MAXUNIQHUDID) },
@@ -6195,6 +6195,12 @@ int32_t preinitengine(void)
             { (void **) &state_decompress, sizeof(qlz_state_decompress)                       }
         };
 
+        if (editstatus)
+        {
+            dynarray[1].size += 1024*sizeof(walltype);
+            Bprintf("FIXME: Allocating additional space beyong wall[] for editor bugs.\n");
+        }
+
         for (i=0; i<(signed)(sizeof(dynarray)/sizeof(dynarray[0])); i++)
             size += dynarray[i].size;
 
diff --git a/polymer/eduke32/source/astub.c b/polymer/eduke32/source/astub.c
index 9dcfb9ef1..498e06b40 100644
--- a/polymer/eduke32/source/astub.c
+++ b/polymer/eduke32/source/astub.c
@@ -103,7 +103,7 @@ int32_t autocorruptcheck = 0;
 static int32_t corruptchecktimer;
 static int32_t curcorruptthing=-1;
 
-int32_t numcorruptthings=0, corruptthings[MAXCORRUPTTHINGS];
+int32_t corruptlevel=0, numcorruptthings=0, corruptthings[MAXCORRUPTTHINGS];
 
 static uint32_t templenrepquot;
 static void fixxrepeat(int16_t i, uint32_t lenrepquot)
@@ -7884,11 +7884,14 @@ static int32_t osdcmd_vars_pk(const osdfuncparm_t *parm)
         {
             if (!Bstrcasecmp(parm->parms[0], "now"))
             {
-                CheckMapCorruption(1, 0);
+                if (CheckMapCorruption(1, 0)==0)
+                    OSD_Printf("All OK.\n");
+                return OSDCMD_OK;
             }
             else if (!Bstrcasecmp(parm->parms[0], "tryfix"))
             {
                 CheckMapCorruption(3, 1);
+                return OSDCMD_OK;
             }
             else if (isdigit(parm->parms[0][0]))
             {
@@ -9987,8 +9990,8 @@ void ExtCheckKeys(void)
 
         if (autocorruptcheck>0 && totalclock > corruptchecktimer)
         {
-            if (CheckMapCorruption(3, 0)>=4)
-                message("Corruption detected. See OSD for details.");
+            if (CheckMapCorruption(3, 0)>=3)
+                printmessage16("Corruption detected. See OSD for details.");
             corruptchecktimer = totalclock + 120*autocorruptcheck;
         }
     }
@@ -10084,7 +10087,10 @@ int32_t CheckMapCorruption(int32_t printfromlev, int32_t tryfixing)
         CORRUPTCHK_PRINT(5, 0, CCHK_PANIC "WALL LIMIT EXCEEDED (MAXWALLS=%d)!!!", MAXWALLS);
 
     if (numsectors>MAXSECTORS || numwalls>MAXWALLS)
+    {
+        corruptlevel = bad;
         return bad;
+    }
 
     seen_nextwalls = Bcalloc((numwalls+7)>>3,1);
     if (!seen_nextwalls) return 5;
@@ -10253,6 +10259,8 @@ int32_t CheckMapCorruption(int32_t printfromlev, int32_t tryfixing)
     Bfree(seen_nextwalls);
     Bfree(lastnextwallsource);
 
+    corruptlevel = errlevel;
+
     return errlevel;
 }
 ////