Blank screen

[cameron]

Could you enable debugging and see whether it shows any errors? It’s hard to figure out what’s gone wrong from an empty page ;-)

Clarification: This is occurring on attempt to install.
I am having a similar problem with a site I'm working on. I turned on debugging and I saw that I was getting several error regarding permission setting of the data and backups directories. I chmod these to 777 and these errors have gone away, but now I'm still getting the following errors.

Code:

Warning: unlink(/var/www/html/mydomain.com/admin/install.php) [function.unlink]: Permission denied in /var/www/html/mydomain.com/admin/inc/common.php on line 135

Warning: unlink(/var/www/html/mydomain.com/admin/setup.php) [function.unlink]: Permission denied in /var/www/html/mydomain.com/admin/inc/common.php on line 140

Notice: Use of undefined constant PATHINFO_FILENAME - assumed 'PATHINFO_FILENAME' in /var/www/html/mydomain.com/admin/inc/plugin_functions.php on line 26

Warning: pathinfo() expects parameter 2 to be long, string given in /var/www/html/mydomain.com/admin/inc/plugin_functions.php on line 26

Notice: Use of undefined constant PATHINFO_FILENAME - assumed 'PATHINFO_FILENAME' in /var/www/html/mydomain.com/admin/inc/plugin_functions.php on line 26

Warning: pathinfo() expects parameter 2 to be long, string given in /var/www/html/mydomain.com/admin/inc/plugin_functions.php on line 26

Notice: Constant GSIMAGEWIDTH already defined in /var/www/html/mydomain.com/gsconfig.php on line 16

Notice: Constant GSDEBUG already defined in /var/www/html/mydomain.com/gsconfig.php on line 19

Fatal error: Call to undefined function dom_import_simplexml() in /var/www/html/mydomain.com/admin/inc/basic.php on line 111

It seems this may not be a chmod issue and more likely a chown issue instead. I have worked with the server admin extensively, and he has even granted me root access to attempt to troubleshoot, but everthing I try I get the same thing.

Any ideas what might be going on?

Thanks for your time and efforts.