Users with several spaces in middle of username displays incorrect

Users with several spaces in username (for example: 'alex popov') displays incorrect (like users with only 1 space in username, in previously case: 'alex popov').

AR: User's username display different at Jcommune, and in database.

ER: User's username should display at JCommune same as it's been registered, same as in database.

Note: At screens I've logged as 'alex popov' (9 spaces in middle of username).