Feedler crashes on refresh

On first use, it imported well my feeds (only 2 entries). Then, it suddenly closed.

After, I tried to open it one more time. It shows nothing, and when I try to refresh (using the refresh button), it closes again.

I'm using Ubuntu, Oneiric, upgraded. sqlheavy from the SqlHeavy PPA (I use beatbox too, so I had the sqlheavylib already installed in my system).

Here goes the terminal output:

==== X ====

andre@andre-ubuntu:~$ feedler
[INFO 13:05:56.287137] [Application:83] Feedler version: 0.0.1
[INFO 13:05:56.287349] [Application:86] Kernel version:
Feedler.App.change_mode ()
[FATAL 13:05:56.527566] [Gtk] gtk_tree_view_get_selection: assertion `GTK_IS_TREE_VIEW (tree_view)' failed
[FATAL 13:05:56.527766] Feedler will not function properly.
[FATAL 13:05:56.527995] [Gtk] gtk_tree_selection_get_selected: assertion `GTK_IS_TREE_SELECTION (selection)' failed
[FATAL 13:05:56.528173] Feedler will not function properly.
[FATAL 13:05:56.585120] feedler_sidebar_add_folder: assertion `folder_name != NULL' failed
[FATAL 13:05:56.585269] Feedler will not function properly.
[FATAL 13:05:56.585408] feedler_sidebar_add_folder: assertion `folder_name != NULL' failed
[FATAL 13:05:56.585519] Feedler will not function properly.
[FATAL 13:05:56.585643] feedler_sidebar_add_folder: assertion `folder_name != NULL' failed
[FATAL 13:05:56.585743] Feedler will not function properly.
[FATAL 13:05:56.586772] feedler_sidebar_add_channel_to_folder: assertion `channel_name != NULL' failed
[FATAL 13:05:56.586890] Feedler will not function properly.
[FATAL 13:05:56.587033] feedler_sidebar_add_channel_to_folder: assertion `channel_name != NULL' failed
[FATAL 13:05:56.587135] Feedler will not function properly.
Feedler.App.next_unreaded ()
Falha de segmentação

=== X ====

Don't tried further functions with the Feedler 'coz the feeds aren't showing at all.