hi, i have experienced the same problem with IIS, however upgrading (and it definitly IS an upgrade) to apache is not possible since i have production servers running IIS and no person to run apache that can do it in a production environment - my solution is to use CGI instead of ISAPI - it's not the schweeet low level access that ISAPI provides, but I don't think the ISAPI php lib is stable enough yet to use in critical apps - most have better running php as CGI.
just my 2 sense of it. cheers, jon-david