The latest Tracker release seems to have downcased all labels.

We had labels in our project in a variety of case (such as "Search" or "BLOCKED!"), and with the latest Tracker release, all of these labels have been converted by Tracker to lower case (e.g., "search" and "blocked!"). This seems to me to be a bug with the latest release -- it seems reasonable to me that one should be permitted to have both upper and lower case in a label (and Tracker supported this up until a day or two ago).