Are you using HTML articles or InDesign-based articles? As I mentioned, if you're using HTML articles, you'll probably be fine with just the 1 top-level collection. Then you'll be able to define different browse page layouts for phones and tablets with next week's release. But if you want different ...

A few questions:Does your project include 1 top-level collection or 2 top-level collections? Select "Collections" in the left rail, and then look for either one collection called "default" or two collections called "default phone" and "default tablet." If you just have a "default" collection, it mea...

I'll find out if there is a bug. It's possible that HTML gestures are overriding this setting, which would account for your experience in which disabling horizontal swiping works properly with fixed-layout content but not with HTML content.

As a general rule, don't worry about any yellow triangle message that appears when you upload an app binary. You don't need to take any action. Just submit the app for review.

Nate - Can you reset InDesign preferences and then try exporting again? If that doesn't work, you might try uninstalling/reinstalling InDesign.

The team resolved this issue by updating the InDesign CC 2015 plug-in. You can either wait until the updated plug-in becomes available through an InDesign CC 2015 update, or you can manually download and install the DPS tools here: Digital Publishing Solution Help | Install tools for DPS 2015

No, that's not right. You can add portrait and landscape fixed-layout articles to the same collection, and they'll both display, but one will have severe letterboxing. And if you rotate the device, nothing will change. I believe the feature you're referring to would allow users to rotate the device ...

During your trial, you can preview your content using the DPS Preflight app, which is available in the iTunes App Store. The Apple developer certificates are required only for building a custom app.

You can also download these assets on DPS 2015 getting started page: Digital Publishing Solution Help | Getting started with DPS 2015

Fonts should work fine. Are you using the DPS Preflight app? That doesn't support custom fonts. You need to build an app.