Hello, The What's On app has been acting wonky lately (past few weeks). Either you can't get into the channel listings with no message or it displays a message about needing to re-input the zip code and all the settings information. Or it works.
Hmmm, I have a Roku 3. It says version 7.70 build 4103. However, I did another update and a restart for good luck, and now it's working (even though it still says the same version number). Thanks for the tip.