I upgraded CiviCRM from 4.7.19 to 4.7.22. In the new version there is obviously a check implemented that compares imageUploadDir and imageUploadURL. Probably if they don't match after exchanging the cms.root (path and URL) it warns.
In our configuration we want to have different values here, because we provide the images from a different domain to save bandwidth to our CiviCRM server.
The problem is, that if we configure it like we want to (namely that imageUploadURL points to a different domain than CiviCRM is provided from) the form to create new bulk mails doesn't load anymore. The system status page behaves the same (it doesn't load as well as long as the two values don't match in the sense explained above).
Does anyone else observe this behaviour?