I fix this bug ...
patch php_mailparse_mime.c

--- php_mailparse_mime.c	Mon Feb 28 14:21:45 2005
+++ php_mailparse_mime.c.new	Fri Dec 15 10:57:16 2006
@@ -54,7 +54,11 @@
 {
 	struct php_mimeheader_with_attributes *attr;
 	int i, first_semi, next_semi, comments_before_semi, netscape_bug = 0;
-	
+    char *name_buf = NULL;
+    smart_str value_buf = {0};
+    int is_rfc2231_name = 0;
+    char *check_name;
+
 	attr = ecalloc(1, sizeof(struct php_mimeheader_with_attributes));
 
 	MAKE_STD_ZVAL(attr->attributes);
@@ -106,7 +110,7 @@
 
 				/* count those tokens; we expect "token = token" (3 tokens); if there are
 				 * more than that, then something is quite possibly wrong - Netscape Bug! */
-				if (next_semi <= toks->ntokens
+				if (next_semi < toks->ntokens
 						&& toks->tokens[next_semi].token != ';'
 						&& next_semi - first_semi - comments_before_semi > 3) {
 					next_semi = i + 1;
@@ -117,9 +121,56 @@
 						PHP_RFC822_RECOMBINE_STRTOLOWER|PHP_RFC822_RECOMBINE_IGNORE_COMMENTS);
 				value = php_rfc822_recombine_tokens(toks, i, next_semi - i,
 						PHP_RFC822_RECOMBINE_IGNORE_COMMENTS);
-			
-				add_assoc_string(attr->attributes, name, value, 0);
-				efree(name);
+	
+                /* support rfc2231 mime parameter value 
+                 *
+                 * Parameter Value Continuations:
+                 *
+                 * Content-Type: message/external-body; access-type=URL;
+                 * URL*0="ftp://";
+                 * URL*1="cs.utk.edu/pub/moore/bulk-mailer/bulk-mailer.tar"
+                 * 
+                 * is semantically identical to
+                 *
+                 * Content-Type: message/external-body; access-type=URL;
+                 * URL="ftp://cs.utk.edu/pub/moore/bulk-mailer/bulk-mailer.tar"
+                 * 
+                 * Parameter Value Character Set and Language Information: 
+                 *
+                 * Content-Type: application/x-stuff;
+                 * title*=us-ascii'en-us'This%20is%20%2A%2A%2Afun%2A%2A%2A
+                 *
+                 * Modify by Zhao Wei
+                 * E-mail: zhaowei@eyou.net
+                 */
+                check_name = name;
+                while (*check_name) {
+                    if (*check_name == '*')
+                        break;
+                    check_name++;
+                }
+                if (*check_name == '*') {
+                    *check_name = 0;
+                    if (NULL == name_buf)
+                        name_buf = name;
+                    else
+                        efree(name);
+                    smart_str_appends(&value_buf, value);
+                    efree(value);
+                    is_rfc2231_name = 1;
+                }
+                
+                if (1 == is_rfc2231_name) {
+                    if (*name != 0 && strcmp(name_buf, name) != 0) {
+                        add_assoc_string(attr->attributes, name_buf, estrndup(value_buf.c, value_buf.len), 0);
+                        efree(name_buf);
+                        smart_str_free(&value_buf);
+                        is_rfc2231_name = 0;
+                    }
+                } else {
+                    add_assoc_string(attr->attributes, name, value, 0);
+                    efree(name);
+                }
 			}
 		}
 		if (next_semi < toks->ntokens && !netscape_bug)
@@ -128,6 +179,13 @@
 		first_semi = next_semi;
 		netscape_bug = 0;
 	}
+    if (1 == is_rfc2231_name) {
+        add_assoc_string(attr->attributes, name_buf, estrndup(value_buf.c, value_buf.len), 0);
+        efree(name_buf);
+        smart_str_free(&value_buf);
+    }
+
+
 	return attr;
 }

This bug has been fixed in CVS.

In case this was a documentation problem, the fix will show up at the
end of next Sunday (CET) on pecl.php.net.

In case this was a pecl.php.net website problem, the change will show
up on the website in short time.
 
Thank you for the report, and for helping us make PECL better.