>> I've decided (for better or worse) to go ahead with the "dist-upgrade" > > It will probably work out OK; if it does not then you know where to find > us. > Thanks. I've fixed the problem by installing apache and apache2 (as part of a full dist-upgrade which seems to have gone OK) then purging apache-common libapache-mod-php4 and apache. AFAICS he docs don't suggest upgrading aptitude first - even though it looks like a logical step.