Visual Problem in last update under Mint 17.2 Xfce

When Initialise Plank in the startup, initiates a double-size bar and immediately switches to correct size but leaves a line in the screen where it stood if he had double size. The line appear in all the programs, firefox, steam, vlc

when I uninstall plank the problem disappears

[INFO 00:28:14.352937] [AbstractMain:246] Plank version: 0.9.1.1363
[INFO 00:28:14.353022] [AbstractMain:247] Kernel version: 3.13.0-24-generic
[INFO 00:28:14.353077] [AbstractMain:248] GLib version: 2.40.2 (2.40.2)
[INFO 00:28:14.353144] [AbstractMain:251] GTK+ version: 3.10.8 (3.10.8)
[INFO 00:28:14.353203] [AbstractMain:254] Wnck version: 3.14.0
[INFO 00:28:14.353261] [AbstractMain:255] Cairo version: 1.13.1
[INFO 00:28:14.353318] [AbstractMain:256] Pango version: 1.36.3
[INFO 00:28:14.353372] [AbstractMain:258] + Gtk+ FrameClock usage enabled
[INFO 00:28:14.353422] [AbstractMain:261] + Gtk+ CSD support enabled
[INFO 00:28:14.353470] [AbstractMain:264] + Cairo/Gtk+ HiDPI support enabled
[INFO 00:28:14.353520] [AbstractMain:267] + Dynamic Quicklists support enabled
[INFO 00:28:14.353568] [AbstractMain:270] + XInput Barriers support enabled
[INFO 00:28:14.380412] [WindowControl:68] Window-manager: Xfwm4
[DEBUG 00:28:14.391083] [Preferences:340] Loading preferences from file '/home/sabre/.config/plank/dock1/settings'
[DEBUG 00:28:14.435584] [Preferences:340] Loading preferences from file '/usr/share/plank/themes/Transpanel/dock.theme'
[WARN 00:28:14.435818] [Preferences:356] Missing key 'IconShadowSize' for group 'PlankDrawingDockTheme' in preferences file '/usr/share/plank/themes/Transpanel/dock.theme' - using default value
[WARN 00:28:14.435866] [Preferences:356] Missing key 'FadeOpacity' for group 'PlankDrawingDockTheme' in preferences file '/usr/share/plank/themes/Transpanel/dock.theme' - using default value
[WARN 00:28:14.435954] [Preferences:356] Missing key 'UrgentHueShift' for group 'PlankDrawingDockTheme' in preferences file '/usr/share/plank/themes/Transpanel/dock.theme' - using default value
[WARN 00:28:14.435994] [Preferences:356] Missing key 'ItemMoveTime' for group 'PlankDrawingDockTheme' in preferences file '/usr/share/plank/themes/Transpanel/dock.theme' - using default value
[DEBUG 00:28:14.436199] [Preferences:522] Saving preferences '/usr/share/plank/themes/Transpanel/dock.theme'
[ERROR 00:28:14.602932] Unable to get org.ayatana.bamf matcher: Error al llamar StartSereviceByName para org.ayatana.bamf: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process /usr/lib/x86_64-linux-gnu/bamf/bamfdaemon exited with status 1