I've noticed something with version 11.50.12. When user agent is set to mobile, Facebook obviously loads the mobile page. This allows me to Check In, however it doesn't show the option to upload a photo (after going back and forth trying to find a way to get the Photo option available, I was given a message saying "Sorry, your browser does not support photo uploads. Please consider the option below: [email address]").

However, if I change the user agent to Desktop, and reload or visit the Home page of Facebook, the Check in option is replaced with "Photo", allowing me to upload a photo and tag people in it. If I close Opera, and launch it again (whilst still keeping the user agent as Desktop), I get the full desktop site.

Is there a way to fix this functionality, or is it to do with FB's mobile site?