diff --git a/src/mod_pubsub/mod_pubsub.erl b/src/mod_pubsub/mod_pubsub.erl
index 2f606d4df..fe0149dec 100644
--- a/src/mod_pubsub/mod_pubsub.erl
+++ b/src/mod_pubsub/mod_pubsub.erl
@@ -264,8 +264,8 @@ terminate_plugins(Host, ServerHost, Plugins, TreePlugin) ->
     ok.
 
 init_nodes(Host, ServerHost) ->
-    %create_node(Host, ServerHost, ["home"], service_jid(Host), "hometree"),
-    %create_node(Host, ServerHost, ["home", ServerHost], service_jid(Host), "hometree"),
+    create_node(Host, ServerHost, ["home"], service_jid(Host), "hometree"),
+    create_node(Host, ServerHost, ["home", ServerHost], service_jid(Host), "hometree"),
     ok.
 
 update_node_database(Host, ServerHost) ->
diff --git a/src/mod_pubsub/mod_pubsub_odbc.erl b/src/mod_pubsub/mod_pubsub_odbc.erl
index bab0e3734..d6a95ae06 100644
--- a/src/mod_pubsub/mod_pubsub_odbc.erl
+++ b/src/mod_pubsub/mod_pubsub_odbc.erl
@@ -263,8 +263,8 @@ terminate_plugins(Host, ServerHost, Plugins, TreePlugin) ->
     ok.
 
 init_nodes(Host, ServerHost) ->
-    %create_node(Host, ServerHost, ["home"], service_jid(Host), "hometree_odbc"),
-    %create_node(Host, ServerHost, ["home", ServerHost], service_jid(Host), "hometree_odbc"),
+    create_node(Host, ServerHost, ["home"], service_jid(Host), "hometree_odbc"),
+    create_node(Host, ServerHost, ["home", ServerHost], service_jid(Host), "hometree_odbc"),
     ok.
 
 update_node_database(Host, ServerHost) ->
diff --git a/src/mod_pubsub/node_hometree.erl b/src/mod_pubsub/node_hometree.erl
index 011ea428a..6484fbe0a 100644
--- a/src/mod_pubsub/node_hometree.erl
+++ b/src/mod_pubsub/node_hometree.erl
@@ -321,8 +321,8 @@ subscribe_node(NodeId, Sender, Subscriber, AccessModel,
 	%%	% Requesting entity is anonymous
 	%%	{error, ?ERR_FORBIDDEN};
 	true ->
-	    case pubsub_subscription:subscribe_node(Subscriber, NodeId, Options) of
-		{result, SubId} ->
+	    case pubsub_subscription:add_subscription(Subscriber, NodeId, Options) of
+		SubId when is_list(SubId) ->
 		    NewSub = case AccessModel of
 				 authorize -> pending;
 				 _ -> subscribed
@@ -409,7 +409,7 @@ delete_subscription(SubKey, NodeID, {Subscription, SubId}, SubState) ->
     Affiliation = SubState#pubsub_state.affiliation,
     AllSubs = SubState#pubsub_state.subscriptions,
     NewSubs = AllSubs -- [{Subscription, SubId}],
-    pubsub_subscription:unsubscribe_node(SubKey, NodeID, SubId),
+    pubsub_subscription:delete_subscription(SubKey, NodeID, SubId),
     case {Affiliation, NewSubs} of
 	{none, []} ->
 	    % Just a regular subscriber, and this is final item, so
@@ -727,7 +727,7 @@ replace_subscription({Sub, SubId}, [{_, SubID} | T], Acc) ->
     replace_subscription({Sub, SubId}, T, [{Sub, SubID} | Acc]).
 
 unsub_with_subid(NodeId, SubId, SubState) ->
-    pubsub_subscription:unsubscribe_node(SubState#pubsub_state.stateid,
+    pubsub_subscription:delete_subscription(SubState#pubsub_state.stateid,
 					 NodeId, SubId),
     NewSubs = lists:filter(fun ({_, SID}) -> SubId =/= SID end,
 			   SubState#pubsub_state.subscriptions),
diff --git a/src/mod_pubsub/nodetree_tree.erl b/src/mod_pubsub/nodetree_tree.erl
index 39724db46..99b4b8891 100644
--- a/src/mod_pubsub/nodetree_tree.erl
+++ b/src/mod_pubsub/nodetree_tree.erl
@@ -161,6 +161,12 @@ get_parentnodes_tree(Host, Node, From) ->
 get_subnodes(Host, Node, _From) ->
     get_subnodes(Host, Node).
 get_subnodes(Host, Node) ->
+%    mnesia:foldl(fun(#pubsub_node{nodeid = {H, _}, parents = Parents} = N, Acc) ->
+%			case lists:member(Node, Parents) and (Host == H) of
+%			    true -> [N | Acc];
+%			    false -> Acc
+%			end
+%		 end, [], pubsub_node).
     Q = qlc:q([N || #pubsub_node{nodeid = {NHost, _},
 				 parents = Parents} = N <- mnesia:table(pubsub_node),
 		       Host == NHost,
@@ -176,10 +182,10 @@ get_subnodes_tree(Host, Node, _From) ->
 %%     From = mod_pubsub:jid()
 get_subnodes_tree(Host, Node) ->
     mnesia:foldl(fun(#pubsub_node{nodeid = {H, N}} = R, Acc) ->
-			 case lists:prefix(Node, N) and (H == Host) of
-			     true -> [R | Acc];
-			     _ -> Acc
-			 end
+			case lists:prefix(Node, N) and (H == Host) of
+			    true -> [R | Acc];
+			    false -> Acc
+			end
 		 end, [], pubsub_node).
 
 %% @spec (Host, Node, Type, Owner, Options) -> ok | {error, Reason}
@@ -190,7 +196,7 @@ get_subnodes_tree(Host, Node) ->
 %%     Options = list()
 create_node(Host, Node, Type, Owner, Options) ->
     BJID = jlib:jid_tolower(jlib:jid_remove_resource(Owner)),
-    case mnesia:read({pubsub_node, {Host, Node}}) of
+    case catch mnesia:read({pubsub_node, {Host, Node}}) of
 	[] ->
 	    {ParentNode, ParentExists} =
 		case Host of
@@ -199,14 +205,14 @@ create_node(Host, Node, Type, Owner, Options) ->
 			%% PEP does not uses hierarchy
 			{[], true};
 		    _ ->
-			Parent = lists:sublist(Node, length(Node) - 1),
-			case Parent of
+			case lists:sublist(Node, length(Node) - 1) of
 			[] -> 
 			    {[], true};
-			_ ->
-			    case mnesia:read({pubsub_node, {Host, Parent}}) of
-				[] -> {Parent, false};
-				_ -> {Parent, lists:member(BJID, Parent#pubsub_node.owners)}
+			Parent ->
+			    case catch mnesia:read({pubsub_node, {Host, Parent}}) of
+				[#pubsub_node{owners = [{[], Host, []}]}] -> {Parent, true};
+				[#pubsub_node{owners = Owners}] -> {Parent, lists:member(BJID, Owners)};
+				_ -> {Parent, false}
 			    end
 			end
 		end,
diff --git a/src/mod_pubsub/nodetree_tree_odbc.erl b/src/mod_pubsub/nodetree_tree_odbc.erl
index 95f9b34ef..6468913d1 100644
--- a/src/mod_pubsub/nodetree_tree_odbc.erl
+++ b/src/mod_pubsub/nodetree_tree_odbc.erl
@@ -220,13 +220,15 @@ create_node(Host, Node, Type, _Owner, Options) ->
 		    %% PEP does not uses hierarchy
 		    {[], true};
 		_ ->
-		    Parent = lists:sublist(Node, length(Node) - 1),
-		    ParentE = (Parent == []) orelse 
+		    case lists:sublist(Node, length(Node) - 1) of
+		    [] ->
+			{[], true};
+		    Parent ->
 			case nodeid(Host, Parent) of
-			    {result, _} -> true;
-			    _ -> false
-			end,
-		    {Parent, ParentE}
+			    {result, _} -> {Parent, true};
+			    _ -> {Parent, false}
+			end
+		    end
 		end,
 	    case ParentExists of
 		true -> 
diff --git a/src/mod_pubsub/pubsub_subscription.erl b/src/mod_pubsub/pubsub_subscription.erl
index 754a9d8f8..5f3038d35 100644
--- a/src/mod_pubsub/pubsub_subscription.erl
+++ b/src/mod_pubsub/pubsub_subscription.erl
@@ -32,6 +32,12 @@
 	 get_options_xform/2,
 	 parse_options_xform/1]).
 
+% Internal function also exported for use in transactional bloc from pubsub plugins
+-export([add_subscription/3,
+	 delete_subscription/3,
+	 read_subscription/3,
+	 write_subscription/4]).
+
 -include_lib("stdlib/include/qlc.hrl").
 
 -include("pubsub.hrl").
diff --git a/src/mod_pubsub/pubsub_subscription_odbc.erl b/src/mod_pubsub/pubsub_subscription_odbc.erl
index 56ddf6d4b..98e62abaa 100644
--- a/src/mod_pubsub/pubsub_subscription_odbc.erl
+++ b/src/mod_pubsub/pubsub_subscription_odbc.erl
@@ -22,7 +22,7 @@
 %%% ====================================================================
 
 -module(pubsub_subscription_odbc).
--author("bjc@kublai.com").
+-author("pablo.polvorin@process-one.net").
 
 %% API
 -export([init/0,
@@ -33,8 +33,6 @@
 	 get_options_xform/2,
 	 parse_options_xform/1]).
 
--include_lib("stdlib/include/qlc.hrl").
-
 -include("pubsub.hrl").
 -include("jlib.hrl").
 
@@ -90,10 +88,9 @@ init() ->
 
 subscribe_node(_JID, _NodeID, Options) ->
     SubId = make_subid(),
-    ok =  pubsub_db_odbc:add_subscription(#pubsub_subscription{subid = SubId,
-							      options = Options}),
+    ok = ?DB_MOD:add_subscription(#pubsub_subscription{subid = SubId, options = Options}),
     {result, SubId}.
-	
+
 
 unsubscribe_node(_JID, _NodeID, SubID) ->
     {ok, Sub} = ?DB_MOD:read_subscription(SubID),
@@ -105,7 +102,7 @@ get_subscription(_JID, _NodeID, SubID) ->
 	{ok, Sub} -> {result, Sub};
 	notfound -> {error, notfound}
     end.
-	
+
 
 set_subscription(_JID, _NodeID, SubID, Options) ->
     case ?DB_MOD:read_subscription(SubID) of
@@ -115,7 +112,7 @@ set_subscription(_JID, _NodeID, SubID, Options) ->
 	notfound -> 
 	     {error, notfound}
     end.
-	
+
 
 get_options_xform(Lang, Options) ->
     Keys = [deliver, show_values, subscription_type, subscription_depth],