(BTW alternative fix was to get rid of old ruby version)

Description formatting is broken.

http://www.codewars.com/kata/reviews/5736bde7b55a16839400001e/groups/5ac2d9bcfd6f28844e00175d

Will do when I get a chance!! Looking forward to it.

Hey, I'm trying to get my Kata out of Beta same as you. I figure the best way to do it is to help other authors by doing their Kata's and hoping that in return they can check mine out. Having said that, if you get a chance, maybe you can give it a whirl! http://www.codewars.com/kata/duplicate-array-number-transpose-functionality

Totally fine if you don't. I'm happy to help either way. Cheers!

Your understanding is correct.
All the test cases don't necessarily deal with legal English words/sentences.
And therefore, I more inclined to update the description as suggested by you.

Test cases need to include titleized words as well. Or the description should be updated to indicate the exclusion of mismatching case palindromes (Racecar != racecaR).

Some solutions will return 5 for "Racecar" rather than 7 but still pass.

Unless my understanding of a palindrome is incorrect, racecar is still a palindrome even when it's titleized (Racecar).

I suppose the details didn't say anything about case sensitivity, but isn't racecar still a palindrome even when it's titleized (Racecar)?

longest_palindrome 'Racecar'
=> 5
R'aceca'r