Well, in a sense. I guess instead of the cat being both living and dead at the same given moment, this would backup the idea that the cat is living in one branch of reality and dead in another.
To simplify, no matter how the poison escapes, it kills the cat.
No matter how the poison DOESN'T escape, it leaves the cat alone.
So, if in several realities, the poison escapes through the vial being broken by a hammer, a leak being present in the cork in the vial, etc, the end result is the same. So while reality splits infinities as to how the poison escapes the vial, those realities recombine at the end and the result is that the cat is dead.
This vastly simplifies things; in general, one could say that reality splits to allow for every variation of the molecules of the box containing the cat and poison. If the position of the molecules doesn't change the end result of the experiment, reality simply recombines to ignore all those extra positions of the molecules since, in the end, they really don't matter. I base this idea on the fact that Nature, by nature, isn't wasteful; why keep splitting reality to account for things that will not influence other things? This almost goes to "Effect before Cause" as if Nature (or Reality) knows what will and will not influence something in the future (another headache for another time).
The observer wouldn't notice all the other realities of the different positions of the molecules of the box; instead the observer would only "focus in" on either the reality where the cat is alive, or the reality where the cat is dead. This gets vastly more interesting when, in the experiment, you have two people who can control which reality they "focus" on and they both pick two different outcomes. Now, the cat is both alive AND dead in one reality, ala "Superposition".
Yes, you can argue that the two observers each take a different path as reality splits to allow the cat to be either alive or dead and depending on which reality they focus on they would take that particular split, but that's another, different headache--and also incredibly off-topic.
Oh, I'm sorry, did I derail the train?