...and when you get a chance to ask the software engineer what his answer is to those two questions then post it here.
...and what will you consider to be standard behaviour if he answers to the affirmative on both those points?
I believe you are right about how the program should close when telling the software to close from within the Block Editor and that this is a flaw in the software design.
I also do not expect there to be a fix from Autodesk concerning this matter for 2010 software but they may.
If you have not already:
I hope you get a satisfactory answer.
Yeah, I'm not holding my breath for 2010... though I have indeed reported the bug.
I do, however, want the rest of the AutoCAD-using world to know that this flaw exists, and that it apparently continues to be a problem for current releases. Many people may never come across it, but those that do will probably have a really bad day because of it. I know I did.