Heratech

I had a look at my drupal status page after migrating to my CentOS VPS. Quite a few errors. Here are some of the fixes:

yum install php-gd (then restart httpd with service httpd restart)
yum install ImageMagick
chmod 755 sites/default/files (not you might have to change owner of folder etc)

I also installed the excellent workspace module: http://drupal.org/project/workspace