Originally Posted by Toney
if you can goto your PP admin and select GD2 as your image processor - > Global options > Imaging Integration (IM or GD) and select GD2, this would stop the error upon upload, if you would like to still use IM (image magick) i would suggest you contact your host and ask them to upgrade the IM installation.
Your forum cookie prefix for vbulletin is usually bb this should also be set the same in photopost, also check the cookie domain i.e .mysite.com(notice the 2 dots) - if you have phpmyadmin you can find these settings in the photopost 'settings' table, alter them accordingly.
I changed to GD2 and this fixed the upload problem; where would I go about finding what I have the forum cookie prefix set to? I'm pretty sure I saw it in the VB
options and it was blank.