I just tried to post a reply and listed 5 different airline codes separated by commas as the whole response
FT won't let me capitalize them

I can type them in as caps, but when the post appears, they are all lowercase. If I type something else into the reply, then the capitalization will stick. IF I remove the other post contents, the list will revert to lowercase.
This is the post:
http://www.flyertalk.com/forum/20577572-post292.html