Index: postprocessor_test.c
===================================================================
--- postprocessor_test.c	(revision 8149)
+++ postprocessor_test.c	(working copy)
@@ -41,9 +41,9 @@
  * five NULL-entries.
  */
 const char *want[] = {
-#define URL_DATA "abc=def&x=5"
+#define URL_DATA "abc=def%2C&x=5"
 #define URL_START 0
-  "abc", NULL, NULL, NULL, "def",
+  "abc", NULL, NULL, NULL, "def,",
   "x", NULL, NULL, NULL, "5",
 #define URL_END (URL_START + 10)
   NULL, NULL, NULL, NULL, NULL,
Index: postprocessor.c
===================================================================
--- postprocessor.c	(revision 8149)
+++ postprocessor.c	(working copy)
@@ -404,6 +404,7 @@
           /* unescape */
           xbuf[xoff] = '\0';    /* 0-terminate in preparation */
           MHD_http_unescape (xbuf);
+          xoff = strlen(xbuf);
 
           /* finally: call application! */
           if (MHD_NO == pp->ikvi (pp->cls, MHD_POSTDATA_KIND, (const char *) &pp[1],    /* key */