I'm experiencing the same issue as itrombley, as it's impossible to change my LuLa log-in username to one appropriate for the forum.
Following the instructions posted in the Help section:
Display Name - A member may choose a display name that is different to their username. The Display Name appears next to a member's posts in the forum, so it is the name that is visible to the public. After registering at a forum, the display name is usually set to be the same as the username, but you can change this in the section Profile > Account Settings. Change the text in the field Name and then click on Change profile at the bottom of the page in order to save.
But it asks for my password and when I enter it, I always get an error message that my password is incorrect, which it's not.
Have tried three different browsers multiple times with the same error message.
Thanks in advance for your assistance.