I recently upgraded our site to the latest Debian Testing release – this installs WordPress 3.4.2 and Php 5.4.
It has been a complete nightmare and after finally solving permission issues I go to upgrading Mailpress.
I upgraded Mailpress from vers 3 RC1 to vers 3.
I can activate the mailpress plugin but not the newsletter addon. Activating results in a apache2 500 internal error. I have deactivated all other addons in attempts to isolate the problem with no joy.