=== modified file 'libseahorse/seahorse-ssh-key-data.c'
--- libseahorse/seahorse-ssh-key-data.c	2008-01-09 22:52:51 +0000
+++ libseahorse/seahorse-ssh-key-data.c	2008-01-09 23:34:20 +0000
@@ -90,7 +90,7 @@
     for (i = 0; i < MD5_LEN; i++) {
         char hex[4];
         snprintf (hex, sizeof (hex), "%02x:", (int)(digest[i]));
-        strncat (fingerprint, hex, MD5_LEN * 3 + 1);
+        strncat (fingerprint, hex, strlen(fingerprint) - (MD5_LEN * 3 + 1) - 1);
     }
 
     /* Remove the trailing ':' character */