I go into my Favorite world (luckily I backed it up) 🙂 I see both of my other bugs that I reported and than get this crash message (download of crash and backup-world linked). I didn't go into the world in 14w27x this may be the cause.
http://www.mediafire.com/download/i5oba5l5f9vxrqq/The_Doctor.zip
I understand you're trying to be helpful, but expecting people to download a 77-megabyte file just to get at the crash report is unreasonable. Please also attach the crash report directly to the bug in the future.