During d2n... I found that these were caused by using an older compiled version of the event_list_ppc.o. I'll also check to make sure the front-end busy's are hooked up correctly (as well as the buffered strings, transferred to the readout list).
For the night... we'll running the LeftHRS in un-buffered mode.
A copy of this log entry has been emailed to: brads, miham