QuantumBadger

This isn't a bug -- it looks like you clicked on a post tagged with the word "spoiler", and the image in the post was shown as expected. We could...

Could you expand on what you mean by this please?

This has been available since the first release of RedReader, in the "Front Page" option. I've renamed this to "Subscribed Posts" in the next version (for logged-in users) for clarity.

Yes, that's the behaviour of the "Front Page" option at the top of the main menu. It's shows recent/popular posts from your subscribed subreddits.

Not sure what you mean -- unless you've explicitly disabled it in the settings, "Front Page" is the first item in the main menu.