On Tue, Feb 18, 2014 at 9:23 PM, Isarra Yos zhorishna@gmail.com wrote:
Right, a warning is definitely good. Main question is just how best to go about that.
I can think of at least two other people who've been surprised/disappointed by similar (in one case for the uppercaseness, in another the _ disappearing).
Just apply the necessary string changes (capitalization, underscores, etc.) on blur and show a small informational message. Don't make the user think - tell them what's going on, and if it's a problem for them, they will correct their behavior accordingly.