I'm currently running a host with 5.0 installed and wanted to upgrade to 5.1. Is there any real issues or concerns I should have in doing this? I run 5.1 on my dev server without any issues but I do host some accounts for a couple of resellers. Would there be any logical reason not to upgrade to 5.1? Perhaps some incompatbilities with a "major" open source package like Wordpress, Wordpress MU, Drupal, Joomla, osCommerce, etc.? From what it looks like in WHM it's mostly some added features. Any security holes in 5.1 to be concerned about?
I'd prefer to upgrade to 5.1 to be current but when 5.0 was installed as the default it raised the question.