User Name contains dot character(.) cannot navigate

[aronezhang]

If the registered user name is contained the dot character, the member url is ommited the dot character caused the navigation failed,for example, I've registered the user eleven.xu, then the user posted the blog, then the url for eleven.xu
​http://oracleseeker.com/members/elevenxu/.

so it cannot navigate to the member home.

[apeatling]

Add this to your wp-config.php

define( 'BP_ENABLE_USERNAME_COMPATIBILITY_MODE', true );