I've read one other person talk about freezing after update. Not sure which thread it was on.
There have, however, been reports of freezing with all versions of the software, starting from launch.
If you didn't have freezing earlier and now you do, then there might be two culprits
1) The update. A bit unlikely but not impossible.
2) Some app you're running in the background. The App Killer App (available in store for $1) will let you check what apps are running and then you can make sure there isn't some app running in the background that is causing problems.
Was there any app you downloaded recently that does wireless checks?
Not lately. Will try the app kilker and see what happens. Thanks.