Well sure, however seeing as the bug is "resolved" and this thread has been sitting for some time I just figured I'd look for a fix, which can often be found with a clean slate - in this case allowing the current version of cpbackup to run from scratch. Sure enough it was. Having current off-site backups (which any host worth their salt should have) meant there was no risk involved for me whatsoever. Of course as with anything, everybody will need to weight up the pros and cons of doing this for themselves. An alternative may certainly be to try a "mkdir /backup/cpbackup/weekly/*/bandwidth" or something. I was happier just getting everything clean and fresh to be sure my backup data is the best possible.