Just a quick note on an issue that popped up for me when moving a WordPress / WP-United site to a new host. The move was done by the hosting company without the knowledge of the site and its databases. The WP-United / WordPress combination is somewhat specific, so I wouldn\’t have expected them to have much knowledge of it anyhow.
After moving all the data and the databases, a message that it could not connect to the database kept showing on the site. Going directly to the forums however worked. Within the PHPBB control panel, I then emptied the cache. After that, WordPress was able to function again.