diff --git a/dat/keyhelp b/dat/keyhelp
index 41ab37ef1..d4df8d444 100644
--- a/dat/keyhelp
+++ b/dat/keyhelp
@@ -14,12 +14,12 @@
 	is reporting the wrong character but will be operating correctly if
 	it describes ^J when you type ^M.
 
-	A NUL character, typed as ^<space> on some keyboards, ^@ on others,
-	and maybe not typeable at all on yet others.  It is not used as a
-	command, and will be converted into ESC before reaching 'whatdoes'.
-	Unlike ^M, this transformation is performed by NetHack itself.
-	But like ^M, if you type NUL and get feedback about ESC, the
-	situation is expected.
+	A NUL character, which is typed as ^<space> on some keyboards,
+	^@ on others, and maybe not typeable at all on yet others, is not
+	used as a command, and will be converted into ESC before reaching
+	'whatdoes'.  Unlike ^M, this transformation is performed within
+	NetHack.  But like ^M, if you type NUL and get feedback about ESC,
+	the situation is expected.
 
 	ESC itself is a synonym for ^[, and is another source of oddity.
 	Various function keys, including cursor arrow keys, may transmit
diff --git a/src/cmd.c b/src/cmd.c
index 317405b45..a1020bdba 100644
--- a/src/cmd.c
+++ b/src/cmd.c
@@ -920,6 +920,7 @@ wiz_map_levltyp(VOID_ARGS)
                                           ? 'a' + terrain - 10
                                           : 'A' + terrain - 36);
         }
+        x--;
         if (levl[0][y].typ != STONE || may_dig(0, y))
             row[x++] = '!';
         row[x] = '\0';
diff --git a/src/do_wear.c b/src/do_wear.c
index e588e5413..15f00bbee 100644
--- a/src/do_wear.c
+++ b/src/do_wear.c
@@ -1484,6 +1484,10 @@ int
 cursed(otmp)
 register struct obj *otmp;
 {
+    if (!otmp) {
+        impossible("cursed without otmp");
+        return 0;
+    }
     /* Curses, like chickens, come home to roost. */
     if ((otmp == uwep) ? welded(otmp) : (int) otmp->cursed) {
         boolean use_plural = (is_boots(otmp) || is_gloves(otmp)
diff --git a/src/objnam.c b/src/objnam.c
index 7a800d23a..af3cc2511 100644
--- a/src/objnam.c
+++ b/src/objnam.c
@@ -2839,11 +2839,12 @@ struct obj *no_wish;
          */
         if (!strstri(bp, "wand ") && !strstri(bp, "spellbook ")
             && !strstri(bp, "finger ")) {
-            if (((p = strstri(bp, "tin of ")) != 0)
-                && (tmp = tin_variety_txt(p + 7, &tinv))
-                && (mntmp = name_to_mon(p + 7 + tmp)) >= LOW_PM) {
-                *(p + 3) = 0;
+            if ((p = strstri(bp, "tin of ")) != 0) {
+                tmp = tin_variety_txt(p + 7, &tinv);
                 tvariety = tinv;
+                mntmp = name_to_mon(p + 7 + tmp);
+                typ = TIN;
+                goto typfnd;
             } else if ((p = strstri(bp, " of ")) != 0
                        && (mntmp = name_to_mon(p + 4)) >= LOW_PM)
                 *p = 0;
diff --git a/sys/unix/nethack.sh b/sys/unix/nethack.sh
index 47d0da861..eec1991d6 100755
--- a/sys/unix/nethack.sh
+++ b/sys/unix/nethack.sh
@@ -4,8 +4,6 @@
 HACKDIR=/usr/games/lib/nethackdir
 export HACKDIR
 HACK=$HACKDIR/nethack
-# NB: MAXNROFPLAYERS is deprecated in favor of MAXPLAYERS in SYSCF.
-MAXNROFPLAYERS=4
 
 # Since Nethack.ad is installed in HACKDIR, add it to XUSERFILESEARCHPATH
 case "x$XUSERFILESEARCHPATH" in
@@ -65,11 +63,4 @@ fi
 
 
 cd $HACKDIR
-case $1 in
-	-s*)
-		exec $HACK "$@"
-		;;
-	*)
-		exec $HACK "$@" $MAXNROFPLAYERS
-		;;
-esac
+exec $HACK "$@"
diff --git a/sys/unix/unixmain.c b/sys/unix/unixmain.c
index 2d6452ce8..1c0d55f90 100644
--- a/sys/unix/unixmain.c
+++ b/sys/unix/unixmain.c
@@ -419,10 +419,14 @@ char *argv[];
         }
     }
 
-    /* XXX This is deprecated in favor of SYSCF with MAXPLAYERS.  Make
-     * an error in next release. */
+#ifdef SYSCF
+    if (argc > 1)
+        raw_printf("MAXPLAYERS are set in sysconf file.\n");
+#else
+    /* XXX This is deprecated in favor of SYSCF with MAXPLAYERS */
     if (argc > 1)
         locknum = atoi(argv[1]);
+#endif
 #ifdef MAX_NR_OF_PLAYERS
     /* limit to compile-time limit */
     if (!locknum || locknum > MAX_NR_OF_PLAYERS)
diff --git a/win/tty/wintty.c b/win/tty/wintty.c
index e38e3e7c8..adec33c22 100644
--- a/win/tty/wintty.c
+++ b/win/tty/wintty.c
@@ -2448,19 +2448,22 @@ const char *str;
        topline wrapping converts space at wrap point into newline,
        we reverse that here */
     if ((int) strlen(str) >= CO || index(str, '\n')) {
-        register const char *bp0 = str;
-        char c, nxtc, *bp1 = cbuf, *endbp1 = &cbuf[sizeof cbuf - 1];
+        const char *in_str = str;
+        char c, *outstr = cbuf, *outend = &cbuf[sizeof cbuf - 1];
+        boolean was_space = TRUE; /* True discards all leading spaces;
+                                     False would retain one if present */
 
-        cbuf[0] = cbuf[sizeof cbuf - 1] = '\0'; /* superfluous */
-        nxtc = (*bp0 == '\n') ? ' ' : *bp0;
-        do {
-            c = nxtc;
-            nxtc = bp0[1];
-            if (nxtc == '\n')
-                nxtc = ' ';
-            if (c != ' ' || nxtc != ' ')
-                *bp1++ = c;
-        } while (*bp0++ && bp1 < endbp1);
+        while ((c = *in_str++) != '\0' && outstr < outend) {
+            if (c == '\n')
+                c = ' ';
+            if (was_space && c == ' ')
+                continue;
+            *outstr++ = c;
+            was_space = (c == ' ');
+        }
+        if ((was_space && outstr > cbuf) || outstr == outend)
+            --outstr; /* remove trailing space or make room for terminator */
+        *outstr = '\0';
         str = cbuf;
     }
     return str;