Index: firmware/common/strnatcmp.c
===================================================================
--- firmware/common/strnatcmp.c	(Revision 20347)
+++ firmware/common/strnatcmp.c	(Arbeitskopie)
@@ -67,11 +67,16 @@
 
 
 static inline int
-nat_toupper(int a)
+nat_tolower(int a)
 {
-     return toupper(a);
+     return tolower(a);
 }
 
+static inline int
+nat_iszero(int a)
+{
+    return a == '0';
+}
 
 
 static int
@@ -81,26 +86,26 @@
      int ca, cb;
      
      /* The longest run of digits wins.  That aside, the greatest
-	value wins, but we can't know that it will until we've scanned
-	both numbers to know that they have the same magnitude, so we
-	remember it in BIAS. */
+    value wins, but we can't know that it will until we've scanned
+    both numbers to know that they have the same magnitude, so we
+    remember it in BIAS. */
      for (;; a++, b++) {
       ca = to_int(*a);
       cb = to_int(*b);
-	  if (!nat_isdigit(ca)  &&  !nat_isdigit(cb))
-	       return bias;
-	  else if (!nat_isdigit(ca))
-	       return -1;
-	  else if (!nat_isdigit(cb))
-	       return +1;
-	  else if (ca < cb) {
-	       if (!bias)
-		    bias = -1;
-	  } else if (ca > cb) {
-	       if (!bias)
-		    bias = +1;
-	  } else if (!ca  &&  !cb)
-	       return bias;
+      if (!nat_isdigit(ca)  &&  !nat_isdigit(cb))
+           return bias;
+      else if (!nat_isdigit(ca))
+           return -1;
+      else if (!nat_isdigit(cb))
+           return +1;
+      else if (ca < cb) {
+           if (!bias)
+            bias = -1;
+      } else if (ca > cb) {
+           if (!bias)
+            bias = +1;
+      } else if (!ca  &&  !cb)
+           return bias;
      }
 
      return 0;
@@ -110,21 +115,22 @@
 static int
 compare_left(char const *a, char const *b)
 {
+     int ca, cb;
      /* Compare two left-aligned numbers: the first to have a
         different value wins. */
      for (;; a++, b++) {
-	  if (!nat_isdigit(*a)  &&  !nat_isdigit(*b))
-	       return 0;
-	  else if (!nat_isdigit(*a))
-	       return -1;
-	  else if (!nat_isdigit(*b))
-	       return +1;
-	  else if (*a < *b)
-	       return -1;
-	  else if (*a > *b)
-	       return +1;
+          ca = to_int(*a);
+          cb = to_int(*b);
+      if (!nat_isdigit(ca)  &&  !nat_isdigit(cb))
+           return 0;
+      else if (!nat_isdigit(ca))
+           return -1;
+      else if (!nat_isdigit(cb))
+           return +1;
+      else if (ca != cb)
+           return ca-cb;
      }
-	  
+      
      return 0;
 }
 
@@ -133,53 +139,67 @@
      int ai, bi;
      int ca, cb;
      int fractional, result;
-     
      assert(a && b);
      ai = bi = 0;
+
+      ca = to_int(*a);
+      cb = to_int(*b);
+
+      /* collapse leading zeros to 1, if a non-digit follows */
+     while (nat_iszero(ca))
+           ca = to_int(a[++ai]);
+     while (nat_iszero(cb))
+           cb = to_int(b[++bi]);
+
+
+      /* We indirectly counted zeros (and spaces). if ai/bi is not zero, and a
+       * non-digit follows, we collapse all zeros except the
+       * the final one, if the previous was a space, it will be killed in
+       * the while loop again */
+     if (ai > 0 && !nat_isdigit(ca))
+            ai--;
+     if (bi > 0 && !nat_isdigit(ca))
+            bi--;
      while (1) {
       ca = to_int(a[ai]);
       cb = to_int(b[bi]);
 
-	  /* skip over leading spaces or zeros */
-	  while (nat_isspace(ca))
-	       ca = to_int(a[++ai]);
+      /* skip over spaces */
+     while (nat_isspace(ca))
+           ca = to_int(a[++ai]);
 
-	  while (nat_isspace(cb))
-	       cb = to_int(b[++bi]);
+     while (nat_isspace(cb))
+           cb = to_int(b[++bi]);
+      /* process run of digits */
+     if (nat_isdigit(ca)  &&  nat_isdigit(cb)) {
+           fractional = (nat_iszero(ca) || nat_iszero(cb));
+           if (fractional) {
+            if ((result = compare_left(a+ai, b+bi)) != 0)
+             return result;
+           } else {
+            if ((result = compare_right(a+ai, b+bi)) != 0)
+             return result;
+           }
+     }
 
-	  /* process run of digits */
-	  if (nat_isdigit(ca)  &&  nat_isdigit(cb)) {
-	       fractional = (ca == '0' || cb == '0');
-
-	       if (fractional) {
-		    if ((result = compare_left(a+ai, b+bi)) != 0)
-			 return result;
-	       } else {
-		    if ((result = compare_right(a+ai, b+bi)) != 0)
-			 return result;
-	       }
-	  }
-
-	  if (!ca && !cb) {
-	       /* The strings compare the same.  Call str[case]cmp() to ensure
+     if (!ca && !cb) {
+           /* The strings compare the same.  Call str[case]cmp() to ensure
                   consistent results. */
                if(fold_case)
                    return strcasecmp(a,b);
                else
                    return strcmp(a,b);
-	  }
+     }
 
-	  if (fold_case) {
-	       ca = nat_toupper(ca);
-	       cb = nat_toupper(cb);
-	  }
-	  
-	  if (ca < cb)
-	       return -1;
-	  else if (ca > cb)
-	       return +1;
+      if (fold_case) {
+           ca = nat_tolower(ca);
+           cb = nat_tolower(cb);
+      }
+      
+      if (ca != cb)
+        return ca-cb;
 
-	  ++ai; ++bi;
+      ++ai; ++bi;
      }
 }