http://www.midnight-commander.org/ticket/287
--- lib/tty/key.c.orig	2013-08-23 22:08:01.273850736 +0200
+++ lib/tty/key.c	2013-08-23 22:08:01.285849858 +0200
@@ -1027,10 +1027,13 @@
         }
     }
 
-    /* F0 is the same as F10 for out purposes */
+    /* F0 is the same as F10 for our purposes */
     if (c == KEY_F (0))
         c = KEY_F (10);
 
+    if (c == KEY_F_IMMUTABLE (0))
+        c = KEY_F_IMMUTABLE (10);
+
     /*
      * We are not interested if Ctrl was pressed when entering control
      * characters, so assume that it was.  When checking for such keys,
@@ -1116,6 +1119,16 @@
         mod &= ~KEY_M_SHIFT;
     }
 
+    /*
+     * Numerals may require modifilers with some keymaps or on obscure
+     * keyboards (e. g. F4 = Esc Shift+4). We have to ignore all
+     * modifiers while interpreting Esc + Numeral.
+     */
+    if (c >= KEY_F_IMMUTABLE (1) && c <= KEY_F_IMMUTABLE (10)) {
+	c += KEY_F (0) - KEY_F_IMMUTABLE (0);
+	mod &= ~KEY_M_MASK;
+    }
+
     if (!mc_global.tty.alternate_plus_minus)
         switch (c)
         {
@@ -1928,7 +1941,7 @@
         {
             /* Convert escape-digits to F-keys */
             if (g_ascii_isdigit (c))
-                c = KEY_F (c - '0');
+                c = KEY_F_IMMUTABLE (c - '0');
             else if (c == ' ')
                 c = ESC_CHAR;
             else
--- lib/tty/tty-slang.h.orig	2013-06-25 23:29:14.000000000 +0200
+++ lib/tty/tty-slang.h	2013-08-23 22:08:01.285849858 +0200
@@ -11,6 +11,7 @@
 /*** typedefs(not structures) and defined constants **********************************************/
 
 #define KEY_F(x) (1000 + x)
+#define KEY_F_IMMUTABLE(x) (970+x)
 
 #define ACS_VLINE    SLSMG_VLINE_CHAR
 #define ACS_HLINE    SLSMG_HLINE_CHAR