Originally Posted by Avwriter
My unit also seems to be a little slower page turns after the update (someone else mentioned this earlier). Also, when turning on/off wifi from within a book, there is a very long pause when returning to the book using the back button. Not a huge deal, but it is quite noticeable.
My guess would be that it is re-indexing the content on your PW (typically that's done as part of most if not all updates). Until it is done there will be some performance degradation.
To check what is going on, go to Home screen and search for '.'. The search results will be empty if everything is indexed, otherwise it will show the indexing status.