I've heard of this one before, and I have viewed the tape. Its not like she smashed the window and after she gets the axe out there is only a small crack in the glass. I don't see that as a noticeable blooper.
I find it noticeable. I just watched this part. After she breaks the glass, the only piece of glass that is left is near the top but when it goes to the wide shot, you can see almost all of the glass is left.