WordWise was developed primarily on iPhone OS 3, and we tested it on iOS 4, but we're getting reports of issues in two main areas:
1) Error connecting to server
2) Crashes loading the game after several moves are made
The first issue is likely to do with storing and using authentication information. What's probably happening is that the authentication used to log into our servers is timing out, and we need to fix the app to either refresh or fetch new credentials.
The second is most likely a memory issue. Each tile is a separate graphic, and since the crash is occurring later in games, while attempting to load, it is likely because the memory required to render a larger number of tiles is causing the crash. This is probably mostly occurring on older devices.
Sorry for the issues. We're going to get them fixed as soon as we can. In the meantime, if you do have problems, if you could email us at firstname.lastname@example.org and let us know what happened and what device and OS you're using, that would really help us troubleshoot.