I found many waring in /var/log/messages

[fender0107401]

Hi all:

I found many warning in /var/log/messages, look this:

Mar 24 22:36:12 PC-686 gdm-simple-greeter[1031]: Gtk-WARNING: Failed to set text from markup due to error parsing markup: Error on line 1: Entity did not end with a semicolon; most likely you used an ampersand character without intending to start an entity - escape ampersand as &
Mar 24 22:36:13 PC-686 gdm-simple-greeter[1031]: Gtk-WARNING: Failed to set text from markup due to error parsing markup: Error on line 1: Entity did not end with a semicolon; most likely you used an ampersand character without intending to start an entity - escape ampersand as &
Mar 24 22:36:13 PC-686 gdm-simple-greeter[1031]: Gtk-WARNING: Failed to set text from markup due to error parsing markup: Error on line 1: Entity did not end with a semicolon; most likely you used an ampersand character without intending to start an entity - escape ampersand as &
Mar 24 22:36:13 PC-686 gdm-simple-greeter[1031]: Gtk-WARNING: Failed to set text from markup due to error parsing markup: Error on line 1: Entity did not end with a semicolon; most likely you used an ampersand character without intending to start an entity - escape ampersand as &
Mar 24 22:36:13 PC-686 gdm-simple-greeter[1031]: Gtk-WARNING: Failed to set text from markup due to error parsing markup: Error on line 1: Entity did not end with a