We've had quite a time trying to work around bugs in Flash Player 11.2, for our chat application, and though we found a workaround, our workaround has made the chat app more prone to crash.
We are not the only flash-based site affected. Here is one, which documents the same kind of problems we were having, and which suggests to their users to downgrade to Flash Player 11.1 until Adobe releases 11.3. If you want to consider that, here is the post on that site, with Flash Player downgrade instructions:
Adobe Flash Player 11.2 Bugs | SingSnap Karaoke