Wordpress Multisite Configuration

Would it be posible to have a member of the WPMU DEV support team take a look at our multisite configuration and advise us on proper setup.

In sum, some things work very well, and others do not.

For example:

(1.) Add a new subdomain works 50% of the time--we get a page that says "are you sure you want to do this?' and the domain will not have been added.

(2.) Updating to the new Wordpress 3.5 looks like this: Unpacking the update > Verifying the unpacked files > Could not copy file > Installation Failed

(3.) When using Gravity Forms "Add-ons"we get: An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums.

WPMU DEV is the one community we trust to provide a deeper level of access to our site.