[ubuntu] Ubuntu 15.04 has a background with garbled characters instead of the actual name. topic

Hello, im new to ubuntu 15.04 and i found a bug:
On the changing background, there is a background that instead of displaying its name it will display some random letters instead of the name.
This is what the random letters are:
xgu472hf2

Dont believe me? Look at this screenshot:

http://imgur.com/SWtZ0NS