However you might come across a problem i just had....
If you have a model utilising STI, you may find (like I) that you get a big bad "superclass mismatch for class X". ActiveRecord is instantiating your model class based on the 'type' column in your STI table - even if you use the parent class.
I hacked a workaround by disabling STI in my migration:
# Disable Single Table Inheritance...
ActiveRecord::Base.inheritance_column = 'something_to_disable_single_table_inheritance'
This will mean it won't look for a column called 'type' but whatever else you say there - just make sure you don't have a column called 'something_to_disable_single_table_inheritance'