I don't think you have to sync inbetween deleting one at a time ... I haven't gone looking for the actual code that has the problem yet, so I don't have an immediate workaround to offer you. I have to decide if I want to spend time hunting that bug and put out a release that fixes just that or whether I want to just wait and put out the whole next release together ... It will probably be next weekend before I can get the next release out.