Still the same thing, I think it might be a GTK dependency version problem,
or where Xubuntu stores a file (I see some indication some are "missing"
but they just might be in a different folder due to Xubuntu 11.10 using
LXDE and not XFCE as I had thought?)
Synaptic is showing no broken packages, and all the latest versions but who
knows. Might be a bug in the Gnome libraries?
My system is fairly complicated, as I've installed both Gnome and KDE on
it, as I went a little nuts installing "this and that" not in the original
packages, (when it should be using either XFCE or LXDE, from what I
understand.) It's definitely not a standard 'buntu, so things are likely
not to be perfect.
Might re-install  Pinta and see what happens.
I'm fairly new at this so, no ideas besides those.
Thanks!

On Fri, Jan 20, 2012 at 4:48 AM, Robert Nordan <email address hidden>wrote:

> Well, this isn't instantly reproducible on my system anyway so what you
> say about dependencies might be right. However, the error trace doesn't
> look like a typical dep problem. Is the problem still reproducible for
> you?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/914554
>
> Title:
>  exception on using eyedropper select
>
> Status in Pinta:
>  New
>
> Bug description:
>  Using Xubuntu 11.10 with gnome (3) and kde libraries both installed. I
> imagine I'm missing some dependancies?
>  Upon selecting eyedropper tool, the following exception repeatedly shows:
>
>  Unhandled exception:
>  Exception has been thrown by the target of an invocation.
>  Details:
>  System.Reflection.TargetInvocationException: Exception has been thrown by
> the target of an invocation. ---> System.NullReferenceException: Object
> reference not set to an instance of an object
>    at Pinta.Core.GdkExtensions.Invalidate (Gdk.Window w) [0x00000] in
> <filename unknown>:0
>    at Pinta.Gui.Widgets.ColorPaletteWidget.Palette_ColorChanged
> (System.Object sender, System.EventArgs e) [0x00000] in <filename unknown>:0
>    at Pinta.Core.PaletteManager.OnPrimaryColorChanged () [0x00000] in
> <filename unknown>:0
>    at Pinta.Core.PaletteManager.set_PrimaryColor (Color value) [0x00000]
> in <filename unknown>:0
>    at Pinta.Tools.ColorPickerTool.OnMouseDown (Gtk.DrawingArea canvas,
> Gtk.ButtonPressEventArgs args, PointD point) [0x00000] in <filename
> unknown>:0
>    at Pinta.Core.BaseTool.DoMouseDown (Gtk.DrawingArea canvas,
> Gtk.ButtonPressEventArgs args, PointD point) [0x00000] in <filename
> unknown>:0
>    at Pinta.Gui.Widgets.PintaCanvas.<PintaCanvas>m__E (System.Object
> sender, Gtk.ButtonPressEventArgs e) [0x00000] in <filename unknown>:0
>    at (wrapper managed-to-native)
> System.Reflection.MonoMethod:InternalInvoke
> (System.Reflection.MonoMethod,object,object[],System.Exception&)
>    at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags
> invokeAttr, System.Reflection.Binder binder, System.Object[] parameters,
> System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
>    --- End of inner exception stack trace ---
>    at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags
> invokeAttr, System.Reflection.Binder binder, System.Object[] parameters,
> System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
>    at System.Reflection.MethodBase.Invoke (System.Object obj,
> System.Object[] parameters) [0x00000] in <filename unknown>:0
>    at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x00000]
> in <filename unknown>:0
>    at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args)
> [0x00000] in <filename unknown>:0
>    at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] in
> <filename unknown>:0
>    at GLib.Signal.ClosureInvokedCB (System.Object o,
> GLib.ClosureInvokedArgs args) [0x00000] in <filename unknown>:0
>    at GLib.SignalClosure.Invoke (GLib.ClosureInvokedArgs args) [0x00000]
> in <filename unknown>:0
>    at GLib.SignalClosure.MarshalCallback (IntPtr raw_closure, IntPtr
> return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr
> invocation_hint, IntPtr marshal_data) [0x00000] in <filename unknown>:0
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/pinta/+bug/914554/+subscriptions
>