The not a valid host means that you have the referer check on in your config file... and you (or your users are behind a firewall).
The firewall blocks the referer and does not allow you to post in threads.
Either - turn off the referer check in your config file, or disable your firewall/add your site to the trusted sites.
Instructions here:
Browser ProblemsThe second error.... looks like your stylesheets and your stylesheet directory is not writable. "Permission denied" make sure ownership and permissions are correct on these files. Alot of time ownerships and permissions will get goofed when you move from one server to another. You might need to chown all the file to make sure they are owned by the right user, and double check all your permissions. If you are on a Unix server -
this part of the manual will help.
