A recent modification to ABP workunit generation (bundling 10 dispersion measures into a single workunit) has caused all these new workunits to fail with validation errors. We have identified the cause and are working to fix this; for the moment we have stopped generating new ABP work. It may be a day or so before we issue more ABP work. If possible we will revalidate the work in question so that volunteers get credited, and the work does not need to be repeated.