I got both numbers and letters. All I can suggest is that you try again.
But, a little note on the hunt: When I finally found the set for hunt #5, it SAID that it was for hunt #4, so don't think you messed up or something (like I did at first). :)
I just checked them and each file has numbers and lower case letters
Where is the info on this set? I don't see it as part of the anniversary hunt...Maybe I'm thinking of the wrong site.
It is in the 1st. hint for the anneversary hunt. Look for the "Click Here" and it will download the fall lower case letters and numbers
I got the lower case and the numbers in the JEF format. Try another format maybe.