Errors:
400 /admin/manage_reseller_owners.php
400 /client/software.php
Not styled:
/admin/manage_reseller_users.php
/admin/ip_manage.php
/admin/settings_lostpassword.php
/admin/settings_ports.php
/admin/software_manage.php
/admin/settings_plugins.php
/reseller/software_upload.php
/reseller/alias.php
/reseller/settings_welcome_mail.php
/reseller/settings_lostpassword.php
/reseller/hosting_plan_add.php
/reseller/user_statistics.php
/reseller/ip_usage.php
/reseller/ticket_create.php
/reseller/domain_edit.php
/reseller/domain_details.php
/reseller/user_add2.php
/client/dns_add.php
/client/mail_accounts.php
/client/mail_add.php
/client/mail_catchall.php
/client/mail_external.php
/client/traffic_statistics.php
/client/webtools.php
/client/error_pages.php
/client/backup.php
/client/ticket_create.php
/client/domain_edit.php
/client/mail_edit.php
/client/subdomain_edit.php
The button for the previous login / user (if you choose to switch to another user) looks odd. Theres just the name of the "real" account. It should be named like "back to * account" or similar to the current design name thing for it. 
I am not sure if I got all the pages, but should be pretty much it.
But so far, looks really great. Thanks for the work. 
