Workaround for shitty wxMac (or osx, who knows)

gui/chromeTabs.py

@@ -1171,8 +1171,9 @@ class PFTabsContainer(wx.Panel):
         if self.FindTabAtPos(cposx, cposy) == self.previewTab:
             if not self.previewTab.GetSelected():
                 page = self.Parent.GetPage(self.GetTabIndex(self.previewTab))
-                self.previewWnd = PFNotebookPagePreview(self,(mposx+3,mposy+3), page.Snapshot(), self.previewTab.text)
-                self.previewWnd.Show()
+                if page.Snapshot():
+                    self.previewWnd = PFNotebookPagePreview(self,(mposx+3,mposy+3), page.Snapshot(), self.previewTab.text)
+                    self.previewWnd.Show()
 
         event.Skip()
 

gui/fittingView.py

@@ -369,6 +369,9 @@ class FittingView(d.Display):
         self.itemCount = self.GetItemCount()
         self.itemRect = self.GetItemRect(0)
 
+        if 'wxMac' in wx.PlatformInfo:
+            self.MakeSnapshot()
+
     def OnShow(self, event):
         if not event.GetShow():
             self.MakeSnapshot()