I've been using the iPhone app for a long time now and have always kept it and the Forum Runner companion app up to date. For quite a while now, I've not been able to click on attachment thumbnails and see the larger size. It would always say "This photo set contains no photos". Linda checked her phone and she doesn't have the same problem.
In addition, we noticed that her version was different than mine. So, I went to the app store and did a search for the WF app. When I pulled it up, it didn't say that it was already installed as I expected. So, I installed it and it created a completely new and separate instance of the app. This new version has a slightly different interface and I can now see the enlarged pics.
Just wanted to share in case others had similar issues and, like me, were not expecting a completely separate app from the one they've been using all along.