diff -Naur potrace-1.7/ChangeLog potrace-1.7x/ChangeLog
--- potrace-1.7/ChangeLog	2005-03-06 02:32:06.000000000 -0400
+++ potrace-1.7x/ChangeLog	2005-11-11 21:15:58.000000000 -0400
@@ -1,5 +1,15 @@
 ChangeLog
 
+	(2005/11/11) PS1 - portability: use binary file i/o in Cygwin.
+	(2005/06/24) PS1 - potracelib: fixed allocation bug. Thanks to
+	Jung Shin for reporting this bug.
+	(2005/06/23) PS1 - potracelib_demo.c: free resources properly.
+	(2005/06/23) PS1 - initialize unused private state to 0.
+	(2005/06/23) PS1 - decompose.c: improved memory allocation scheme.
+	(2005/05/06) PS1 - added "alphacurve" field to private curve
+	structure, so that backends that don't use the public interface
+	(such as the EPS backend) can be warned of non-conforming curves.
+
 v1.7 2005/03/06
 	(2005/03/05) PS1 - fixed progress bar subrange bug.
 
diff -Naur potrace-1.7/check/pgmdiff.c potrace-1.7x/check/pgmdiff.c
--- potrace-1.7/check/pgmdiff.c	2005-02-22 17:31:23.000000000 -0400
+++ potrace-1.7x/check/pgmdiff.c	2005-11-11 22:30:31.000000000 -0400
@@ -24,6 +24,8 @@
   double diff;
   int x, y, d;
 
+  platform_init();
+
   if (ac != 3) {
     fprintf(stderr, "pgmdiff: wrong number of arguments\n");
     fprintf(stderr, "Usage: pgmdiff file1 file2\n");
@@ -38,7 +40,7 @@
   if (strcmp(file1, "-")==0) {
     r = gm_read(stdin, &g1);
   } else {
-    f = fopen(file1, "r");
+    f = fopen(file1, "rb");
     if (!f) {
       fprintf(stderr, "pgmdiff: %s: %s\n", file1, strerror(errno));
       return 2;
@@ -57,7 +59,7 @@
   if (strcmp(file2, "-")==0) {
     r = gm_read(stdin, &g2);
   } else {
-    f = fopen(file2, "r");
+    f = fopen(file2, "rb");
     if (!f) {
       fprintf(stderr, "pgmdiff: %s: %s\n", file2, strerror(errno));
       return 2;
diff -Naur potrace-1.7/src/backend_eps.c potrace-1.7x/src/backend_eps.c
--- potrace-1.7/src/backend_eps.c	2005-02-22 17:31:23.000000000 -0400
+++ potrace-1.7x/src/backend_eps.c	2005-11-11 20:44:07.000000000 -0400
@@ -305,10 +305,10 @@
 }
 
 static int eps_path(privcurve_t *curve) {
-  if (info.longcoding) {
-    return eps_path_long(curve);
-  } else {
+  if (info.longcoding==0 && curve->alphacurve) {
     return eps_path_short(curve);
+  } else {
+    return eps_path_long(curve);
   }
 }
 
diff -Naur potrace-1.7/src/curve.h potrace-1.7x/src/curve.h
--- potrace-1.7/src/curve.h	2005-02-20 18:55:31.000000000 -0400
+++ potrace-1.7x/src/curve.h	2005-11-11 20:44:08.000000000 -0400
@@ -20,6 +20,10 @@
   int *tag;         /* tag[n]: POTRACE_CORNER or POTRACE_CURVETO */
   dpoint_t (*c)[3]; /* c[n][i]: control points. 
 		       c[n][0] is unused for tag[n]=POTRACE_CORNER */
+  /* the remainder of this structure is special to privcurve, and is
+     used in EPS debug output and special EPS "short coding". These
+     fields are valid only if "alphacurve" is set. */
+  int alphacurve;   /* have the following fields been initialized? */
   dpoint_t *vertex; /* for POTRACE_CORNER, this equals c[1] */
   double *alpha;    /* only for POTRACE_CURVETO */
   double *alpha0;   /* "uncropped" alpha parameter - for debug output only */
diff -Naur potrace-1.7/src/decompose.c potrace-1.7x/src/decompose.c
--- potrace-1.7/src/decompose.c	2005-03-06 02:35:51.000000000 -0400
+++ potrace-1.7x/src/decompose.c	2005-11-11 20:35:42.000000000 -0400
@@ -194,6 +194,7 @@
     /* add point to path */
     if (len>=size) {
       size+=100;
+      size*=1.3;
       pt1 = (point_t *)realloc(pt, size * sizeof(point_t));
       if (!pt1) {
 	goto error;
diff -Naur potrace-1.7/src/main.c potrace-1.7x/src/main.c
--- potrace-1.7/src/main.c	2005-02-22 17:31:23.000000000 -0400
+++ potrace-1.7x/src/main.c	2005-11-11 22:30:31.000000000 -0400
@@ -1024,7 +1024,7 @@
   if (filename == NULL || strcmp(filename, "-") == 0) {
     return stdin;
   }
-  return fopen(filename, "r");
+  return fopen(filename, "rb");
 }
 
 /* open a file for writing. Return stdout if filename is NULL or "-" */ 
@@ -1032,7 +1032,7 @@
   if (filename == NULL || strcmp(filename, "-") == 0) {
     return stdout;
   }
-  return fopen(filename, "w");
+  return fopen(filename, "wb");
 }
 
 /* close a file, but do nothing is filename is NULL or "-" */
@@ -1172,6 +1172,10 @@
   int i;
   char *outfile;
 
+  /* platform-specific initializations, e.g., set file i/o to binary */
+  platform_init();
+
+  /* process options */
   dopts(ac, av);
 
   b = info.backend;
diff -Naur potrace-1.7/src/mkbitmap.c potrace-1.7x/src/mkbitmap.c
--- potrace-1.7/src/mkbitmap.c	2005-02-20 18:55:33.000000000 -0400
+++ potrace-1.7x/src/mkbitmap.c	2005-11-11 21:12:48.000000000 -0400
@@ -583,7 +583,7 @@
   if (filename == NULL || strcmp(filename, "-") == 0) {
     return stdin;
   }
-  return fopen(filename, "r");
+  return fopen(filename, "rb");
 }
 
 /* open a file for writing. Return stdout if filename is NULL or "-" */ 
@@ -591,7 +591,7 @@
   if (filename == NULL || strcmp(filename, "-") == 0) {
     return stdout;
   }
-  return fopen(filename, "w");
+  return fopen(filename, "wb");
 }
 
 /* close a file, but do nothing is filename is NULL or "-" */
@@ -639,6 +639,9 @@
   int i;
   char *outfile;
 
+  /* platform-specific initializations, e.g., set file i/o to binary */
+  platform_init();
+
   /* process options */
   dopts(ac, av);
 
diff -Naur potrace-1.7/src/platform.h potrace-1.7x/src/platform.h
--- potrace-1.7/src/platform.h	2005-02-20 18:55:33.000000000 -0400
+++ potrace-1.7x/src/platform.h	2005-11-11 22:07:13.000000000 -0400
@@ -13,4 +13,17 @@
 unsigned int _CRT_fmode = _O_BINARY;
 #endif
 
+#ifdef __CYGWIN__
+#include <fcntl.h>
+#include <io.h>
+static inline void platform_init(void) {
+  setmode(0,O_BINARY); 
+  setmode(1,O_BINARY);
+}
+#else
+static inline void platform_init(void) {
+  /* NOP */
+}
+#endif
+
 #endif /* PLATFORM_H */
diff -Naur potrace-1.7/src/potracelib.c potrace-1.7x/src/potracelib.c
--- potrace-1.7/src/potracelib.c	2005-02-26 21:47:04.000000000 -0400
+++ potrace-1.7x/src/potracelib.c	2005-11-11 20:35:42.000000000 -0400
@@ -64,7 +64,7 @@
   prog.d_prev = param->progress.min;
 
   /* allocate state object */
-  st = (potrace_state_t *)malloc(sizeof(potrace_state_t *));
+  st = (potrace_state_t *)malloc(sizeof(potrace_state_t));
   if (!st) {
     return NULL;
   }
@@ -80,6 +80,7 @@
 
   st->status = POTRACE_STATUS_OK;
   st->plist = plist;
+  st->priv = NULL;  /* private state currently unused */
 
   progress_subrange_end(&prog, &subprog);
 
diff -Naur potrace-1.7/src/potracelib_demo.c potrace-1.7x/src/potracelib_demo.c
--- potrace-1.7/src/potracelib_demo.c	2005-02-21 13:28:12.000000000 -0400
+++ potrace-1.7x/src/potracelib_demo.c	2005-11-11 20:35:42.000000000 -0400
@@ -51,6 +51,14 @@
   return bm;
 }
 
+/* free a bitmap */
+static void bm_free(potrace_bitmap_t *bm) {
+  if (bm != NULL) {
+    free(bm->map);
+  }
+  free(bm);
+}
+
 /* ---------------------------------------------------------------------- */
 /* demo */
 
@@ -91,6 +99,7 @@
     fprintf(stderr, "Error tracing bitmap: %s\n", strerror(errno));
     return 1;
   }
+  bm_free(bm);
   
   /* output vector data, e.g. as a rudimentary EPS file */
   printf("%%!PS-Adobe-3.0 EPSF-3.0\n");
@@ -128,9 +137,8 @@
   printf("grestore\n");
   printf("%%EOF\n");
   
+  potrace_state_free(st);
+  potrace_param_free(param);
+
   return 0;
 }
-
-  
-	
-
diff -Naurw potrace-1.7/src/trace.c potrace-1.7x/src/trace.c
--- potrace-1.7/src/trace.c	2005-02-26 21:54:08.000000000 -0400
+++ potrace-1.7x/src/trace.c	2005-05-06 20:54:42.000000000 -0300
@@ -891,6 +891,7 @@
     curve->alpha[j] = alpha;	/* store the "cropped" value of alpha */
     curve->beta[j] = 0.5;
   }
+  curve->alphacurve = 1;
 
   return 0;
 }
@@ -1165,6 +1166,7 @@
     i1 = mod(i+1,om);
     pp->ocurve.beta[i] = s[i] / (s[i] + t[i1]);
   }
+  pp->ocurve.alphacurve = 1;
 
   free(pt);
   free(pen);