Last modified: 2010-05-15 15:33:04 UTC
If an installaion has $wgCapitalLinks = false; new user accounts cannot be created with a lowercase first letter. Special:Userlogin returns an error of "You have not specified a valid user name." Please note that lowercase first letter usernames worked and were allowed in Version 1.3 Steps to reproduce: 1. Set $wgCapitalLinks = false; 2. Attempt to create an account with a lowercase first letter.
The functionality of this feature got changed in 1.4, it no longer applies to usernames, the rationale was that allowing usernames where the first character was lower case on Wikimedia wikis would cause troubles with any future single sign-in feature. marking the bug as INVALID since it's a matter of a change in functionality between branches.