This bug is a side effect of fixing bug http://www.phpbb.com/bugs/viewreport.php?b=4826" target="_blank

Steps to reproduce:
1. Go to the ACP, to the tab users and groups - costum profile field
2. Create a field with a name longer then 17 characters
3 You get an error page withe the folowing error:

[phpBB Debug] PHP Notice: in file /includes/acp/acp_profile.php on line 632: Undefined index: STEP_0_TITLE_CREATE
[phpBB Debug] PHP Notice: in file /includes/acp/acp_profile.php on line 633: Undefined index: STEP_0_EXPLAIN_CREATE
[phpBB Debug] PHP Notice: in file /adm/index.php on line 159: Cannot modify header information - headers already sent by (output started at /includes/functions.php:2835)
[phpBB Debug] PHP Notice: in file /adm/index.php on line 161: Cannot modify header information - headers already sent by (output started at /includes/functions.php:2835)
[phpBB Debug] PHP Notice: in file /adm/index.php on line 162: Cannot modify header information - headers already sent by (output started at /includes/functions.php:2835)
[phpBB Debug] PHP Notice: in file /adm/index.php on line 163: Cannot modify header information - headers already sent by (output started at /includes/functions.php:2835)

and the text:

Warning

Field identification can only be 17 characters long

This should be an easy fix by inserting an title and an explanation in the languange file