I was updating wp Foro and the attachment plugin today. Since I did that the attachments are no longer shown in my forum. Only the url to the image e.g. http://www...............com/forum/filename/
Before the update everything was fine.
Something went wrong with your update. Need to fix that bug fast!
Please go to Dashboard > Plugins admin page. Deactivate the addon and activate it back. Then delete all caches, then delete wpForo cache in Dashboard > Forums > Dashboard admin page (click on [Delete all caches] button) and check it again.