I just discovered today that Clibu's search is case sensitive. For improved usability, it should default to case insensitive searching. (I assume that the normal search options like case-sensitivity, whole word search, etc., will be added later.)
Search isn't case sensitive however there are issues where it's matching isn't optimal, which will be addressed.
It appears that the Clibu search is indeed case insensitive already. So I think I've hit a bug.
I have an article with the words "MQ Native" in the title.