In researching Altiris Agent logs recently, some new entries appeared. These were classed as informational entries, and were related to the Client Task Agent. Some examples are shown in the screenshot below.
Further research showed that this new level of logging has been added to the Client Task Agent to better track proxy connection and testing, HTTP communication, and task checking. This should aid in determining the communication and function of the Client Task Agent. They are new, and do occur frequently, based on the check-in schedule configured for the Task Server, which is 5 mins by default. At least now you know!