nuvola only acts as shortcut to google music in browser

Thanks for taking the time to report this bug. However, I need more information to investigate it further. Could you provide debug output? See http://projects.fenryxo.cz/Nuvola_Player/Report_bug/ for help.

    Nuvola Info Welcome to Nuvola Player, development version: 1.1~unstable~bzr254
    Nuvola Info Report any issues/bugs you might find to https://bugs.launchpad.net/nuvola-player
    Nuvola Debug command: nuvolaplayer --debug
    Nuvola Debug Built with GLib DBus
    Nuvola Debug Built with libsoup cache
    Nuvola Debug Built with Unity Quick List
    Nuvola Debug Built with User scripts support
libfenryxo Debug ConfigFile: Unable to read file:///home/bryan/.config/nuvolaplayer/main.conf
libfenryxo Debug ConfigFile: Unable to read file:///home/bryan/.config/nuvolaplayer/ui_state.conf
GLib-GObje Debug Read-only property 'read-only-view' on class 'GeeAbstractSet' has type 'GeeCollection' which is not equal to or more restrictive than the type 'GeeSet' of the property on the interface 'GeeSet'

libfenryxo Debug No environment proxy settings.
    Nuvola Debug Valid 'sandbox_pattern = https?://grooveshark.com/' in /usr/share/nuvolaplayer/services/grooveshark/metadata.conf.
    Nuvola Debug Valid 'sandbox_pattern = https?://hypem.com' in /usr/share/nuvolaplayer/services/hypem/metadata.conf.
    Nuvola Debug Valid 'sandbox_pattern = https?://8tracks.com/' in /usr/share/nuvolaplayer/services/eighttracks/metadata.conf.
    Nuvola Debug Valid 'sandbox_pattern = https?://(music\.google\.com/|accounts\.google(\.\w+)+/|(www\.)?google(\.\w+)+/accounts)' in /usr/share/nuvolaplayer/services/googlemusic/metadata.conf.
    Nuvola Debug Valid 'sandbox_pattern = https?://grooveshark.com/' in /usr/share/nuvolaplayer/services/grooveshark/metadata.conf.
    Nuvola Debug Valid 'sandbox_pattern = https?://hypem.com' in /usr/share/nuvolaplayer/services/hypem/metadata.conf.
    Nuvola Debug Valid 'sandbox_pattern = https?://8tracks.com/' in /usr/share/nuvolaplayer/services/eighttracks/metadata.conf.
    Nuvola Debug Valid 'sandbox_pattern = https?://(music\.google\.com/|accounts\.google(\.\w+)+/|(www\.)?google(\.\w+)+/accounts)' in /usr/share/nuvolaplayer/services/googlemusic/metadata.conf.
    Nuvola Debug New page request: URI: file:///usr/share/nuvolaplayer/selector/template.html, frame URI: null
    Nuvola Debug Unity Launcher Entry for nuvolaplayer.desktop
    Nuvola Debug Bus acquired: org.mpris.MediaPlayer2.nuvolaplayer, registering objects
    Nuvola Debug GNOME session appeared: org.gnome.SessionManager, :1.4
    Nuvola Debug Bus name acquired: org.mpris.MediaPlayer2.nuvolaplayer
    Nuvola Debug Action: view
    Nuvola Debug Action: options
    Nuvola Debug Action: help
    Nuvola Debug GNOME settings daemon appeared: org.gnome.SettingsDaemon, :1.8
    Nuvola Debug Sound menu appeared: com.canonical.indicators.sound, :1.112
    Nuvola Debug UbuntuSoundMenu: emmitting 'state_changed' with delay 1 second(s)
    Nuvola Debug Dock vanished: net.launchpad.DockManager
    Nuvola Debug Panel icon: Ubuntu Sound menu visible: true
    Nuvola Debug New page request: URI: nuvola:googlemusic, frame URI: file:///usr/share/nuvolaplayer/selector/template.html
    Nuvola Debug Valid 'sandbox_pattern = https?://(music\.google\.com/|accounts\.google(\.\w+)+/|(www\.)?googl...

Fixed in trunk, revno 256.

Released in 1.0.2

The released fix does nothing for me; the Nuvola frame remains empty. At least it doesn't try and launch Google Music in my browser any more...

See attached screenshot.

Please attach new debug output.

Same here: Ubuntu 11.10 64bit

nuvolaplayer --version
Nuvola Player 1.0.2

nuvolaplayer --debug
    Nuvola Info Welcome to Nuvola Player, version: 1.0.2
    Nuvola Info Report any issues/bugs you might find to https://bugs.launchpad.net/nuvola-player
    Nuvola Debug command: nuvolaplayer --debug
    Nuvola Debug Built with GLib DBus
    Nuvola Debug Built with libsoup cache
    Nuvola Debug Built with Unity Quick List
    Nuvola Debug Built with User scripts support
       Gtk Warning Unable to locate theme engine in module_path: "pixmap",
       Gtk Warning Unable to locate theme engine in module_path: "pixmap",
       Gtk Warning Unable to locate theme engine in module_path: "pixmap",
       Gtk Warning Unable to locate theme engine in module_path: "pixmap",
libfenryxo Debug ConfigFile: Unable to read file:///home/---/.config/nuvolaplayer/main.conf
libfenryxo Debug No environment proxy settings.
    Nuvola Debug Valid 'sandbox_pattern = https?://(music\.google\.com/|accounts\.google(\.\w+)+/|(www\.)?google(\.\w+)+/accounts|accounts\.youtube\.com/accounts)' in /usr/share/nuvolaplayer/services/googlemusic/metadata.conf.
    Nuvola Debug Starting web interface for googlemusic: https://music.google.com/music/listen
    Nuvola Debug New page request: URI: https://music.google.com/music/listen, frame URI: null
    Nuvola Debug Unity Launcher Entry for nuvolaplayer.desktop
    Nuvola Debug Bus acquired: org.mpris.MediaPlayer2.nuvolaplayer, registering objects
    Nuvola Debug GNOME session appeared: org.gnome.SessionManager, :1.2
    Nuvola Debug Bus name acquired: org.mpris.MediaPlayer2.nuvolaplayer
    Nuvola Debug GNOME settings daemon appeared: org.gnome.SettingsDaemon, :1.12
    Nuvola Debug Sound menu appeared: com.canonical.indicators.sound, :1.82
    Nuvola Debug UbuntuSoundMenu: emmitting 'state_changed' with delay 1 second(s)
    Nuvola Debug Action: view
    Nuvola Debug Action: options
    Nuvola Debug Action: help
    Nuvola Debug New page request: URI: https://play.google.com/music/listen, frame URI: null
libfenryxo Debug xdg-open https://play.google.com/music/listen

(google-chrome:15208): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(google-chrome:15208): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(google-chrome:15208): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(google-chrome:15208): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

Created new window in existing browser session.

Google Music is no longer exist, it was renamed to Google Play. You
can download support for Google Play from
http://projects.fenryxo.cz/Nuvola_Player/Services/ and select
Google Play from service selector (menu Service → Switch service).