Hi,
I diffed both version of this action and there is no difference at all, so I suspect the problem is not in the PlayMaker version.
To double check this properly, can you make a copy of your old project, the one that works with an old version of playmaker. What happens when you update playmaker only? does that fail to work then?
If that indeed shows a different in behavior, then can you file a bug report and share this project? cause updates ( especially between such a small increment, fair enough if you where on 1.3 or something, but 1.7 to 1.7.5 is fine) should not change anything in your logic and behavior.
bye,
Jean