How would you want your QA people to deal with this problem?
File a ticket, I will get to it the next time I am in the tracker updating my task list or jotting down the time it took me to do certain things. Anything from QA coming back to me requires my immediate attention because most likely I am holding someone or something up.
There is no magical solution to this problem. :P
What I notice at my current employer is that trying to avoid pulling people into meetings results in what I call "Development by game of Telephone", where software requirements become rumors passed between employees. (Even when requirements are documented -- because the documentation is vague.)
In a perfect world, environments would be exact, configs would never change, and features would be flawlessly documented, but such a world is not one I live in, nor do many other people.