Index: channels/__init__.py
==================================================================
--- channels/__init__.py
+++ channels/__init__.py
@@ -282,15 +282,15 @@
                 self.status("Category parsed empty.")
                 self.streams[category] = self.nothing_found
                 log.INFO("Oooops, parser returned nothing for category " + category)
                 
         # Update treeview/model (if category is still selected)
+        log.UI("load columns datamap streams")
         if self.current == category:
-            uikit.do(lambda:[
-                uikit.columns(self.gtk_list, self.datamap, self.prepare(self.streams[category])),
-                y and self.gtk_list.scroll_to_point(0, y)  # scroll to previous position
-            ])
+            uikit.do(uikit.columns, self.gtk_list, self.datamap, self.prepare(self.streams[category]))
+            if y:
+                uikit.do(self.gtk_list.scroll_to_point, 0, y)  # scroll to previous position
 
         # set pointer
         self.status("")
         self.status(1.0)
 
@@ -300,11 +300,11 @@
         conf.save("cache/" + self.module, self.streams, gz=1)
 
 
     # called occasionally while retrieving and parsing
     def update_streams_partially_done(self, entries):
-        uikit.do(lambda: uikit.columns(self.gtk_list, self.datamap, entries))
+        uikit.do(uikit.columns, self.gtk_list, self.datamap, entries)
 
         
     # finds differences in new/old streamlist, marks deleted with flag
     def deleted_streams(self, new, old):
         diff = []
@@ -404,11 +404,11 @@
             log.STAT(self.module, "→ first_show(); use first category as current =", self.current)
             self.shown = 0,
 
         # Show current category in any case
         log.UI(self.module, "→ first_show(); station list → load(", self.current, ")")
-        uikit.do(self.load, self.current)
+        self.load(self.current)
     
         # put selection/cursor on last position
         if True:#self.shown != None:
             log.STAT(self.module+".first_show()", "select last known category treelist position =", self.shown)
             try:
@@ -438,24 +438,23 @@
         if self.categories:
             conf.save("cache/categories_"+self.module, self.categories)
         if self.catmap:
             conf.save("cache/catmap_" + self.module, self.catmap);
 
-        # display outside of this non-main thread            
+        # display outside of this non-main thread
         uikit.do(self.display_categories)
 
 
     # insert content into gtk category list
     def display_categories(self):
     
-        # remove any existing columns
-        if self.gtk_cat:
-            [self.gtk_cat.remove_column(c) for c in self.gtk_cat.get_columns()]
         # rebuild gtk.TreeView
-        uikit.tree(self.gtk_cat, self.categories, title="Category", icon=gtk.STOCK_OPEN);
+        log.UI("display_categoris: tree→gtk_cat")
+        uikit.tree(self.gtk_cat, self.categories, title="Category", icon=gtk.STOCK_OPEN)
 
         # if it's a short list of categories, there's probably subfolders
+        log.UI("display_categoris: expand_all")
         if len(self.categories) < 20:
             self.gtk_cat.expand_all()
             
         # select any first element
         self.gtk_cat.get_selection().select_path("0") #set_cursor
@@ -484,11 +483,11 @@
         else:
             streams += rows
 
         # Now appending to the liststore directly would be even nicer
         y = int(tv.get_vadjustment().get_value())
-        uikit.do(self.load, self.current, y=y)
+        self.load(self.current, y=y)
 
 
 
 
 
@@ -592,10 +591,11 @@
         sw1.set_property("width_request", 150)
         sw1.show()
         tv1 = gtk.TreeView()
         tv1.set_property("width_request", 75)
         tv1.set_property("enable_tree_lines", True)
+        uikit.tree_column(tv1, "Category")
         tv1.connect("button_release_event", parent.on_category_clicked)
         tv1.show()
         sw1.add(tv1)
         vbox.pack1(sw1, resize=False, shrink=True)
         # stream list