>My problem was that I was storing reference of another object into the property of the business object I wanted to release. The other object could not release because of some other issue so it held up my bizobj in the memory.
>
>Makes sense?

Yes, I believe, this is exactly what is happening in our case as well. Since Chris confirmed my observation, it means, we found a bug in the framework. Strange, that nobody found it before. But now we have to find the culprit and it would be very hard, I'm afraid.