It seems DH deleted some core libraries for PHP. They aren't providing support for this, so I wondered how many other people might have this issue. It generates a 500 error on your web site if you were forced by DH to use a local php.ini from past un-needed changes that weren't corrected. The current file error generates this in your error log
[Mon Aug 04 16:34:21 2008] [error] [client 184.108.40.206] php.cgi: error while loading shared libraries: libpspell.so.15: cannot open shared object file: No such file or directory
Until the time of this error, those libraries were there and active.