Hi there. I’m sorry to hear that you are having problems with the Zen Wikipedia Viewer application, but I can help you out!
If you’re having problems with pages being displayed, have you tried switching to the Standard view? To do that click on the Mobile/Standard button, and choose Standard. This setting will stay active for 30 days, or until you change to Mobile. Wikipedia’s mobile site is pretty new and going through some growing pains. Sometimes you will get errors or have pages not load. Also the mobile site doesn’t display properly in landscape view right now. Switching to Standard view will fix this, until wikipedia fixes their servers.
Other than that, this is a pretty new application and there haven’t been any problems reported with it. If you are having a problem, please fill out the form below to open a support request, and I will get back to you as quickly as possible.