Me too... here is console code:

/usr/lib/ruby/1.8/gnome-art/gnome_art.rb: line 144
   Gtk-WARNING **:Failed to set text from markup due to error parsing markup: Error on line 1: Character ' ' is not valid at the start of an entity name; the & character begins an entity; if this ampersand isn't supposed to be an entity, escape it as &
/usr/lib/ruby/1.8/gnome-art/gnome_art.rb: line 144
   Gtk-WARNING **:Failed to set text from markup due to error parsing markup: Error on line 1: Character ' ' is not valid at the start of an entity name; the & character begins an entity; if this ampersand isn't supposed to be an entity, escape it as &
/usr/lib/ruby/1.8/gnome-art/gnome_art.rb: line 144
   Gtk-WARNING **:Failed to set text from markup due to error parsing markup: Error on line 1: Character ' ' is not valid at the start of an entity name; the & character begins an entity; if this ampersand isn't supposed to be an entity, escape it as &
/usr/lib/ruby/1.8/gnome-art/gnome_art.rb: line 144
   Gtk-WARNING **:Failed to set text from markup due to error parsing markup: Error on line 1: Character ' ' is not valid at the start of an entity name; the & character begins an entity; if this ampersand isn't supposed to be an entity, escape it as &
/usr/lib/ruby/1.8/gnome-art/gnome_art.rb: line 144
   Gtk-WARNING **:Failed to set text from markup due to error parsing markup: Error on line 1: Character ' ' is not valid at the start of an entity name; the & character begins an entity; if this ampersand isn't supposed to be an entity, escape it as &
/usr/lib/ruby/1.8/gnome-art/gnome_art.rb: line 144
   Gtk-WARNING **:Failed to set text from markup due to error parsing markup: Error on line 1: Character ' ' is not valid at the start of an entity name; the & character begins an entity; if this ampersand isn't supposed to be an entity, escape it as &
/usr/lib/ruby/1.8/gnome-art/gnome_art.rb: line 144
   Gtk-WARNING **:Failed to set text from markup due to error parsing markup: Error on line 1: Character ' ' is not valid at the start of an entity name; the & character begins an entity; if this ampersand isn't supposed to be an entity, escape it as &
/usr/lib/ruby/1.8/gnome-art/gnome_art.rb: line 144
   Gtk-WARNING **:Failed to set text from markup due to error parsing markup: Error on line 1: Character ' ' is not valid at the start of an entity name; the & character begins an entity; if this ampersand isn't supposed to be an entity, escape it as &
/usr/lib/ruby/1.8/rexml/formatters/pretty.rb:131:in `[]': no implicit conversion from nil to integer (TypeError)
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:131:in `wrap'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:90:in `write_text'
	from /usr/lib/ruby/1.8/rexml/formatters/default.rb:50:in `write'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:75:in `write_element'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:73:in `each'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:73:in `write_element'
	from /usr/lib/ruby/1.8/rexml/formatters/default.rb:31:in `write'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:75:in `write_element'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:73:in `each'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:73:in `write_element'
	from /usr/lib/ruby/1.8/rexml/formatters/default.rb:31:in `write'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:75:in `write_element'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:73:in `each'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:73:in `write_element'
	from /usr/lib/ruby/1.8/rexml/formatters/default.rb:31:in `write'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:117:in `write_document'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:111:in `each'
	from /usr/lib/ruby/1.8/rexml/formatters/pretty.rb:111:in `write_document'
	from /usr/lib/ruby/1.8/rexml/formatters/default.rb:28:in `write'
	from /usr/lib/ruby/1.8/rexml/document.rb:197:in `write'
	from /usr/lib/ruby/1.8/gnome-art/get_art.rb:133:in `add_backgrounds_entry'
	from /usr/lib/ruby/1.8/gnome-art/ui/main_window.rb:373:in `install_art'
	from /usr/lib/ruby/1.8/gnome-art/ui/main_window.rb:332:in `initialize'
	from /usr/lib/ruby/1.8/gnome-art/ui/main_window.rb:332:in `new'
	from /usr/lib/ruby/1.8/gnome-art/ui/main_window.rb:332:in `install_art'
	from /usr/lib/ruby/1.8/gnome-art/ui/main_window.rb:74:in `on_button_install_clicked'
	from /usr/lib/ruby/1.8/libglade2.rb:45:in `call'
	from /usr/lib/ruby/1.8/libglade2.rb:45:in `connect'
	from /usr/lib/ruby/1.8/gnome-art/gnome_art.rb:144:in `call'
	from /usr/lib/ruby/1.8/gnome-art/gnome_art.rb:144:in `main'
	from /usr/lib/ruby/1.8/gnome-art/gnome_art.rb:144:in `main'
	from /usr/bin/gnome-art:25