I've noticed that on our 3T experiments, the BXH header field "disdaqs" has a value of 0. Older studies run on the 4T scanner have the correct value indicated. All studies have disdaqs indicated in the scanner sequences - the number just doesn't appear in the BXH file.
Apparently the disdaqs value was inadvertently left out of the user CVs (which is where the .bxh files get the value) for the 3T pulse sequences. Allen has been informed of the issue...