I've noticed that the title at the top now changes as you type in your question's title (I don't remember it doing that before). However, if one doesn't actually type in a title before going onto other parts of the form, it just turns blank, which looks a bit odd:
I understand why you might want to do this, but I don't really care for it. If you're going to continue using this method, at least make it still display the "Ask a Question" part if the title field is still empty.
I would personally request that the title not be changed at all. It's just annoying, and as a user I honestly wouldn't expect that to happen. If I leave the tab to go do something else, like find a quote or image, and come back to it, I'd look for "Ask a Question" in the title, not for what I had typed in as the title. That's just confusing, and it makes the tab look like an actual question which already exists, considering "Ask a Question" is now nowhere to be seen in that title.
P.S. How long has the asking page done this? Have I just not noticed it for a while or is it relatively new?