[typo] Help installing - migration error

[Pauli's List Subscriptions]

I get the following error in migration from Typo trunk
checked I out last night - any suggestions?

-- add_column(:contents, :status_confirmed, :boolean)
   -> 0.8755s
-- About to call find_and_update
== AddStatusConfirmedFieldToContent: migrated
(0.8820s) =======================

== FixCanonicalServerUrl: migrating
===========================================
rake aborted!
private method `gsub' called for nil:NilClass

(See full trace by running task with --trace)