I am using 4.1.10 and just had a customer try to modify his profile, but got an error saying his username was invalid and could only contain letters and numbers. He has used his email address since 2006 when we used a previous version of x-cart.
So I found this thread and was glad that it didnt take me TOO long to hunt down the solution ...
but then I realized this thread pertains to 4.1.11 ... and I'm still using 4.1.10
Would the code I found here:
http://forum.x-cart.com/showthread.php?t=42147&page=4 (steps 1 and 2) work on 4.1.10?