Since updating to 2.5 (for SA-CONTRIB-2009-051) with the 5.x branch of imagecache one of our sites has been throwing PHP errors for any new images uploaded when trying to display them via imagecache:
call_user_func(imagecache_resize_image): First argument is expected to be a valid callback...
I guess this stems from this change ie moving these functions from imagecache.module to imagecache_actions.inc and this file not seemingly being included. Reverting that change fixes things. Could anyone shed any light onto where imagecache_actions.inc actually gets included and why in this case it isn't?