Rails 2.1.0 compatability bug

ar-extensions is breaking the following test Rails 2.1.0:

• HasManyAssociationsTest#testfindwithblankconditions

testfindwithblankconditions(HasManyAssociationsTest): ActiveRecord::StatementInvalid: Mysql::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')) AND ( (companies.type = 'Client' OR companies.type = 'SpecialClient' ' at line 1: SELECT * FROM companies WHERE (companies.firm_id = 1 AND ()) AND ( (companies.type = 'Client' OR companies.type = 'SpecialClient' OR companies.type = 'VerySpecialClient' ) ) ORDER BY id

./lib/active_record/connection_adapters/abstract_adapter.rb:147:in `log'
./test/cases/../../lib/active_record/connection_adapters/mysql_adapter.rb:299:in `execute_without_counting'
./test/cases/helper.rb:38:in `execute'
./test/cases/../../lib/active_record/connection_adapters/mysql_adapter.rb:515:in `select'
./lib/active_record/connection_adapters/abstract/database_statements.rb:7:in `select_all_without_query_cache'
./lib/active_record/connection_adapters/abstract/query_cache.rb:61:in `select_all'
./lib/active_record/base.rb:582:in `find_by_sql'
./lib/active_record/base.rb:1341:in `find_every'
./lib/active_record/base.rb:536:in `find'
./lib/active_record/associations/association_collection.rb:47:in `find'
./test/cases/associations/has_many_associations_test.rb:57:in `test_find_with_blank_conditions'
./test/cases/associations/has_many_associations_test.rb:56:in `each'
./test/cases/associations/has_many_associations_test.rb:56:in `test_find_with_blank_conditions'
./lib/../../activesupport/lib/active_support/testing/setup_and_teardown.rb:67:in `__send__'
./lib/../../activesupport/lib/active_support/testing/setup_and_teardown.rb:67:in `run'