Binarylogic Searchlogic

I've run into a slight incompatibility with awesome_nested_set (1.1.1), searchlogic (1.6.4) and scoped acts_as_nested_set.

With everything in place:

class SomeModel < ActiveRecord::Base
  acts_as_nested_set :scope => :account
end

Calling any nested set method fails with:

NoMethodError: undefined method `abstract_class?' for Object:Class
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:2212:in `class_of_active_record_descendant'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:1467:in `base_class'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:1143:in `reset_table_name'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:1139:in `table_name'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:1276:in `columns'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/base.rb:1289:in `column_names'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/searchlogic-1.6.4/lib/searchlogic/conditions/base.rb:106:in `needed?'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/searchlogic-1.6.4/lib/searchlogic/search/base.rb:37:in `needed?'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/searchlogic-1.6.4/lib/searchlogic/active_record/base.rb:159:in `filter_options_with_searchlogic'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/searchlogic-1.6.4/lib/searchlogic/active_record/base.rb:46:in `with_scope'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/named_scope.rb:94:in `named_scope'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/named_scope.rb:177:in `call'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/named_scope.rb:177:in `method_missing'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/collectiveidea-awesome_nested_set-1.1.1/lib/awesome_nested_set.rb:312:in `self_and_descendants'
from /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/collectiveidea-awesome_nested_set-1.1.1/lib/awesome_nested_set.rb:319:in `descendants'

If I remove either the :scope on the nested set or the searchlogic config.gem (installing as a plugin makes no diff btw) then it won't generate any errors.

TIA,

John