If you go into the reddit in pictures settings and turn off the use mobile interface checkbox it should fix the issue.
When the mobile interface is on, Reddit in Pictures is passing us a URL that looks like this:
We take the URL, and try to ask for a JSON version of it for parsing in BaconReader, so, it becomes:
http://www.reddit.com/r/gaming/comments/2c8clo/this_bad_boy_turns_25_today//.compact.json instead of the correct (for BaconReader) http://www.reddit.com/r/gaming/comments/2c8clo/this_bad_boy_turns_25_today/.json
This in turn causes Reddit to throw a 404 Page Not Found error, which gets translated into the error page your seeing.
Our development team are looking at stripping this off in cases where it would cause issues, but for now, turning off the mobile interface option in Reddit in pictures should help.