=== modified file 'sweetter/sweetter/sweet_utils.py'
--- sweetter/sweetter/sweet_utils.py	2008-09-16 18:10:16 +0000
+++ sweetter/sweetter/sweet_utils.py	2008-09-18 18:34:46 +0000
@@ -1045,13 +1045,16 @@
     from datetime import datetime
     u = user
     reply = re.compile("@([A-Za-z_\-\d]*)")
-
+    url = re.compile("((ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?)")
     if comment == "":
         msg = _("write before press enter...")
         raise Exception(msg)
     elif len(comment) > COMMENT_SIZE:
         msg = _("your comment is too long")
         raise Exception(msg)
+    elif url.search(comment) and Sweets.get_num_entries_id(u.id)[1] < 1:
+        msg = _("You can not post URLs on your first post")
+        raise Exception(msg)
 
     # Limitamos el numero de post 
     last = list(Sweets.select(Sweets.q.userID == u.id, orderBy=('-created'))[0:1])