Compile errors after updating SDK

I’m coding an AS3 project with Flex Builder. I just updated my Flex SDK from 3.1 to 3.3. And that’s IT. Now, when I try to compile I get the following errors:

1046: Type was not found or was not a compile-time constant: [mx.automation]::IAutomationObject.

1046: Type was not found or was not a compile-time constant: [mx.core]::IConstraintClient.

I literally changed nothing about my code at all. And to my knowledge, I’m not using either one of these classes.

Any ideas?