>You changed the interface. that's why. Early binding breaks when an interface changes.

Ed,

You are right and you are wrong:
I did not change the interface from my point of view, just the implementation.
I did change the interface from VB's point of view: I had the 'no compatibility' radio button checked in the project properties.
I changed this to project compatibility and now everything works as it did before.

Thanks for your help!

Auke