diff --git a/GPy/core/gp_base.py b/GPy/core/gp_base.py
index 9188fe6f..9c7e4a9e 100644
--- a/GPy/core/gp_base.py
+++ b/GPy/core/gp_base.py
@@ -28,8 +28,7 @@ class GPBase(Model):
             self._Xmean = np.zeros((1, self.input_dim))
             self._Xstd = np.ones((1, self.input_dim))
 
-        Model.__init__(self)
-
+        super(GPBase, self).__init__()
         # All leaf nodes should call self._set_params(self._get_params()) at
         # the end
 
diff --git a/GPy/util/plot_latent.py b/GPy/util/plot_latent.py
index e147d840..c36c5e34 100644
--- a/GPy/util/plot_latent.py
+++ b/GPy/util/plot_latent.py
@@ -2,9 +2,9 @@ import pylab as pb
 import numpy as np
 from .. import util
 
-def plot_latent(Model, labels=None, which_indices=None, resolution=50, ax=None, marker='o', s=40):
+def plot_latent(model, labels=None, which_indices=None, resolution=50, ax=None, marker='o', s=40):
     """
-    :param labels: a np.array of size Model.N containing labels for the points (can be number, strings, etc)
+    :param labels: a np.array of size model.num_data containing labels for the points (can be number, strings, etc)
     :param resolution: the resolution of the grid on which to evaluate the predictive variance
     """
     if ax is None:
@@ -12,26 +12,26 @@ def plot_latent(Model, labels=None, which_indices=None, resolution=50, ax=None,
     util.plot.Tango.reset()
 
     if labels is None:
-        labels = np.ones(Model.N)
+        labels = np.ones(model.num_data)
     if which_indices is None:
-        if Model.input_dim==1:
+        if model.input_dim==1:
             input_1 = 0
             input_2 = None
-        if Model.input_dim==2:
+        if model.input_dim==2:
             input_1, input_2 = 0,1
         else:
             try:
-                input_1, input_2 = np.argsort(Model.input_sensitivity())[:2]
+                input_1, input_2 = np.argsort(model.input_sensitivity())[:2]
             except:
                 raise ValueError, "cannot Atomatically determine which dimensions to plot, please pass 'which_indices'"
     else:
         input_1, input_2 = which_indices
 
     #first, plot the output variance as a function of the latent space
-    Xtest, xx,yy,xmin,xmax = util.plot.x_frame2D(Model.X[:,[input_1, input_2]],resolution=resolution)
-    Xtest_full = np.zeros((Xtest.shape[0], Model.X.shape[1]))
+    Xtest, xx,yy,xmin,xmax = util.plot.x_frame2D(model.X[:,[input_1, input_2]],resolution=resolution)
+    Xtest_full = np.zeros((Xtest.shape[0], model.X.shape[1]))
     Xtest_full[:, :2] = Xtest
-    mu, var, low, up = Model.predict(Xtest_full)
+    mu, var, low, up = model.predict(Xtest_full)
     var = var[:, :1]
     ax.imshow(var.reshape(resolution, resolution).T,
               extent=[xmin[0], xmax[0], xmin[1], xmax[1]], cmap=pb.cm.binary,interpolation='bilinear',origin='lower')
@@ -55,12 +55,12 @@ def plot_latent(Model, labels=None, which_indices=None, resolution=50, ax=None,
             m = marker
 
         index = np.nonzero(labels==ul)[0]
-        if Model.input_dim==1:
-            x = Model.X[index,input_1]
+        if model.input_dim==1:
+            x = model.X[index,input_1]
             y = np.zeros(index.size)
         else:
-            x = Model.X[index,input_1]
-            y = Model.X[index,input_2]
+            x = model.X[index,input_1]
+            y = model.X[index,input_2]
         ax.scatter(x, y, marker=m, s=s, color=util.plot.Tango.nextMedium(), label=this_label)
 
     ax.set_xlabel('latent dimension %i'%input_1)
@@ -88,4 +88,4 @@ def plot_latent_indices(Model, which_indices=None, *args, **kwargs):
     ax = plot_latent(Model, which_indices=[input_1, input_2], *args, **kwargs)
     # TODO: Here test if there are inducing points...
     ax.plot(Model.Z[:, input_1], Model.Z[:, input_2], '^w')
-    return ax
\ No newline at end of file
+    return ax
diff --git a/GPy/util/visualize.py b/GPy/util/visualize.py
index 66322c15..e13335f9 100644
--- a/GPy/util/visualize.py
+++ b/GPy/util/visualize.py
@@ -43,16 +43,16 @@ class vector_show(data_show):
 
 
 class lvm(data_show):
-    def __init__(self, vals, Model, data_visualize, latent_axes=None, sense_axes=None, latent_index=[0,1]):
-        """Visualize a latent variable Model
+    def __init__(self, vals, model, data_visualize, latent_axes=None, sense_axes=None, latent_index=[0,1]):
+        """Visualize a latent variable model
 
-        :param Model: the latent variable Model to visualize.
+        :param model: the latent variable model to visualize.
         :param data_visualize: the object used to visualize the data which has been modelled.
         :type data_visualize: visualize.data_show  type.
         :param latent_axes: the axes where the latent visualization should be plotted.
         """
         if vals == None:
-            vals = Model.X[0]
+            vals = model.X[0]
 
         data_show.__init__(self, vals, axes=latent_axes)
 
@@ -68,13 +68,13 @@ class lvm(data_show):
             self.cid = latent_axes[0].figure.canvas.mpl_connect('axes_enter_event', self.on_enter)
 
         self.data_visualize = data_visualize
-        self.Model = Model
+        self.Model = model
         self.latent_axes = latent_axes
         self.sense_axes = sense_axes
         self.called = False
         self.move_on = False
         self.latent_index = latent_index
-        self.latent_dim = Model.input_dim
+        self.latent_dim = model.input_dim
 
         # The red cross which shows current latent point.
         self.latent_values = vals