The peculiar problems which affected a number of sites yesterday are still not entirely resolved. The majority of affected sites are now behaving normally with the aid of small patches or work arounds. The main site I know of which is not behaving correctly is columnar-cacti.org, some of whose pages are returning empty files, some not parsing pHp and some behaving normally, although there is no apparent differences in the files behaving these various ways. At the moment we still do not know why this is happening. If any similarly odd behaviour is happening elsewhere please let me know.