STI and Inheritance

Hello ~

I have run into an issue with some of my objects not behaving as I
expect.
Basically I am using STI on my Users table and have several types of
users.

BaseUser
–UserType1 < BaseUser
–UserType2 < BaseUser
etc…

Recently when I create a UserType object and save it to the database it
ignores the validation rules for the parent class BaseUser. Furthermore
the
after_validation method in the BaseUser was not being triggered if I
did:

after_validation :run_this

I had to call the run_this method after_validation to get it to trigger.

Any suggestions or thoughts on this would be greatly appreciated.

Thx,