I've upgraded the Magento for one of my clients to version 188.8.131.52. After fixing some minor issues, I'm still looking after a solution why the order detail page is not rendering. There's nothing in the exception log and profiling doesnt tell me anything. on that page. I searched already a lot of solutions on the web, and it's not the array thing.
PHP version is: Php 5.6.16
Have you checked system.log file? Can you send me the screenshot of the screen you are seeing while trying to open order detail page. Once you provide me with detailed issue and screenshot, I can help you further.