A co-worker recently updated to iOS6 on her phone, and once it was complete she could no longer access her photos from her facebook application. As iOS6 changes some privacy settings, it is a simple fix.
Go to Settings -> Privacy -> Facebook and ensure your photos application is switched to On.
Once this is done you will then be able to access your photos
I am always interested in feedback so please feel free to add any comments, or you can mail me here. If you would like to submit a quick tip with full credit and links back to your site then also feel free to contact me.