...and ours was! Long story short, we were in Cosmic Rays for 25 minutes eating dinner prior to the start of
MNSSHP last Thursday. When we came out, it was gone! We did a lot of reading, when we were first looking at our trip, about whether or not strollers were at risk.
A few said it could be a problem, but the vast majority expressed that it had never been a problem. I am certain that we are the exception (the fact that the CM looked dumfounded when I told her displayed how rare this was). However, I want you to be aware that it can happen. If you take a stroller, make sure you mark in some readily identifiable way. That is exactly what we did not do, and I am guessing that made it a much more attractive mark for the person who took it.
That said, I have to say that Disney REALLY came through to keep the problem from becoming a train wreck. Follow this link for the post on that story!
http://www.disboards.com/showthread.php?p=27990585#post27990585