Placed this in the DVR category because I'm not sure how it affects the different Channel clients.
I create all my Advanced Passes using the DVR Web UI.
When searching using "search term" in the DVR Web UI it is NOT CASE SENSITIVE.
In the DVR Web UI, searching for "The Big Bang Theory", or "the big bang theory", you get the same result.
When setting up an Advanced Pass using Title CONTAINS or EQUALS "search term" it IS CASE SENSITIVE.
Create an Advanced Pass using the search term Title CONTAINS or Title EQUALS "the big bang theory", and you get NO RESULTS.