diff --git a/Xext/mitmisc.c b/Xext/mitmisc.c
index a11c9a8ad..924b88063 100644
--- a/Xext/mitmisc.c
+++ b/Xext/mitmisc.c
@@ -42,8 +42,6 @@ in this Software without prior written authorization from The Open Group.
 #include <X11/extensions/mitmiscstr.h>
 #include "modinit.h"
 
-extern Bool permitOldBugs;
-
 #if 0
 static unsigned char MITReqCode;
 #endif
@@ -90,12 +88,8 @@ ProcMITSetBugMode(client)
     REQUEST(xMITSetBugModeReq);
 
     REQUEST_SIZE_MATCH(xMITSetBugModeReq);
-    if ((stuff->onOff != xTrue) && (stuff->onOff != xFalse))
-    {
-	client->errorValue = stuff->onOff;
-	return BadValue;
-    }
-    permitOldBugs = stuff->onOff;
+    if (stuff->onOff != xFalse)
+        return BadRequest;
     return(client->noClientException);
 }
 
@@ -110,7 +104,7 @@ ProcMITGetBugMode(client)
     rep.type = X_Reply;
     rep.length = 0;
     rep.sequenceNumber = client->sequence;
-    rep.onOff = permitOldBugs;
+    rep.onOff = FALSE;
     if (client->swapped) {
     	swaps(&rep.sequenceNumber, n);
     	swapl(&rep.length, n);
diff --git a/dix/events.c b/dix/events.c
index e5ae3e6cf..f6524a329 100644
--- a/dix/events.c
+++ b/dix/events.c
@@ -3217,7 +3217,7 @@ EventSuppressForWindow(register WindowPtr pWin, register ClientPtr client,
 {
     register int i, free;
 
-    if ((mask & ~PropagateMask) && !permitOldBugs)
+    if (mask & ~PropagateMask)
     {
 	client->errorValue = mask;
 	return BadValue;
@@ -3768,7 +3768,7 @@ ProcGrabPointer(ClientPtr client)
 	client->errorValue = stuff->ownerEvents;
         return BadValue;
     }
-    if ((stuff->eventMask & ~PointerGrabMask) && !permitOldBugs)
+    if (stuff->eventMask & ~PointerGrabMask)
     {
 	client->errorValue = stuff->eventMask;
         return BadValue;
@@ -3854,7 +3854,7 @@ ProcChangeActivePointerGrab(ClientPtr client)
     TimeStamp time;
 
     REQUEST_SIZE_MATCH(xChangeActivePointerGrabReq);
-    if ((stuff->eventMask & ~PointerGrabMask) && !permitOldBugs)
+    if (stuff->eventMask & ~PointerGrabMask)
     {
 	client->errorValue = stuff->eventMask;
         return BadValue;
@@ -4155,13 +4155,12 @@ ProcSendEvent(ClientPtr client)
     if (stuff->event.u.u.type == ClientMessage &&
 	stuff->event.u.u.detail != 8 &&
 	stuff->event.u.u.detail != 16 &&
-	stuff->event.u.u.detail != 32 &&
-	!permitOldBugs)
+	stuff->event.u.u.detail != 32)
     {
 	client->errorValue = stuff->event.u.u.detail;
 	return BadValue;
     }
-    if ((stuff->eventMask & ~AllEventMasks) && !permitOldBugs)
+    if (stuff->eventMask & ~AllEventMasks)
     {
 	client->errorValue = stuff->eventMask;
 	return BadValue;
@@ -4378,12 +4377,10 @@ ProcGrabButton(ClientPtr client)
 
 
     grab = CreateGrab(client->index, inputInfo.pointer, pWin, 
-    permitOldBugs ? (Mask)(stuff->eventMask |
-			       ButtonPressMask | ButtonReleaseMask) :
-			(Mask)stuff->eventMask,
-	(Bool)stuff->ownerEvents, (Bool) stuff->keyboardMode,
-	(Bool)stuff->pointerMode, inputInfo.keyboard, stuff->modifiers,
-	ButtonPress, stuff->button, confineTo, cursor);
+        (Mask)stuff->eventMask, (Bool)stuff->ownerEvents,
+        (Bool) stuff->keyboardMode, (Bool)stuff->pointerMode,
+        inputInfo.keyboard, stuff->modifiers, ButtonPress,
+        stuff->button, confineTo, cursor);
     if (!grab)
 	return BadAlloc;
     return AddPassiveGrabToList(grab);
diff --git a/dix/globals.c b/dix/globals.c
index 19721062c..5b854aabc 100644
--- a/dix/globals.c
+++ b/dix/globals.c
@@ -148,12 +148,6 @@ ClientPtr requestingClient;	/* XXX this should be obsolete now, remove? */
 _X_EXPORT TimeStamp currentTime;
 _X_EXPORT TimeStamp lastDeviceEventTime;
 
-/*
- * turn off some error checking, to permit old broken clients (like R2/R3
- * xterms) to work
- */
-_X_EXPORT Bool permitOldBugs = FALSE;
-
 _X_EXPORT int defaultColorVisualClass = -1;
 _X_EXPORT int monitorResolution = 0;
 
diff --git a/dix/window.c b/dix/window.c
index 0bcbf4608..ebc6923fa 100644
--- a/dix/window.c
+++ b/dix/window.c
@@ -2093,7 +2093,7 @@ WhereDoIGoInTheStack(
 	else
 	    return NullWindow;
       case TopIf:
-	if ((!pWin->mapped || (pSib && !pSib->mapped)) && !permitOldBugs)
+	if ((!pWin->mapped || (pSib && !pSib->mapped)))
 	    return(pWin->nextSib);
 	else if (pSib)
 	{
@@ -2108,7 +2108,7 @@ WhereDoIGoInTheStack(
 	else
 	    return(pWin->nextSib);
       case BottomIf:
-	if ((!pWin->mapped || (pSib && !pSib->mapped)) && !permitOldBugs)
+	if ((!pWin->mapped || (pSib && !pSib->mapped)))
 	    return(pWin->nextSib);
 	else if (pSib)
 	{
@@ -2123,7 +2123,7 @@ WhereDoIGoInTheStack(
 	else
 	    return(pWin->nextSib);
       case Opposite:
-	if ((!pWin->mapped || (pSib && !pSib->mapped)) && !permitOldBugs)
+	if ((!pWin->mapped || (pSib && !pSib->mapped)))
 	    return(pWin->nextSib);
 	else if (pSib)
 	{
diff --git a/hw/xfree86/loader/dixsym.c b/hw/xfree86/loader/dixsym.c
index 0e8bb89dd..22fe501f3 100644
--- a/hw/xfree86/loader/dixsym.c
+++ b/hw/xfree86/loader/dixsym.c
@@ -244,7 +244,6 @@ _X_HIDDEN void *dixLookupTab[] = {
     SYMVAR(globalSerialNumber)
     SYMVAR(lastDeviceEventTime)
     SYMVAR(monitorResolution)
-    SYMVAR(permitOldBugs)
     SYMVAR(screenInfo)
     SYMVAR(serverClient)
     SYMVAR(serverGeneration)
diff --git a/include/opaque.h b/include/opaque.h
index bb5bc5e53..4ccccd054 100644
--- a/include/opaque.h
+++ b/include/opaque.h
@@ -70,7 +70,6 @@ extern int limitStackSpace;
 #ifdef RLIMIT_NOFILE
 extern int limitNoFile;
 #endif
-extern Bool permitOldBugs;
 extern Bool defeatAccessControl;
 extern long maxBigRequestSize;
 extern Bool blackRoot;
diff --git a/os/utils.c b/os/utils.c
index def12be49..7a4bd1175 100644
--- a/os/utils.c
+++ b/os/utils.c
@@ -768,8 +768,6 @@ ProcessCommandLine(int argc, char *argv[])
 	    else
 		UseMsg();
 	}
-	else if ( strcmp( argv[i], "bc") == 0)
-	    permitOldBugs = TRUE;
 	else if ( strcmp( argv[i], "-br") == 0)
 	    blackRoot = TRUE;
 	else if ( strcmp( argv[i], "+bs") == 0)