I am failing at this very basic task so I must be overlooking something.
Omeka Version 2.1.2
Mac OS X 10.8.5
I create an item, define it as a Still Image and fill out the Item Type Metadata, partly fill out the Dublin Core fields, browse and select the image to be uploaded (JPEG, RGB, 2541 × 1692 pixels, 954 KB), add the relevant Tags, and assign it to an existing Collection. When I click Save Changes I get the nondescript “Omeka has encountered an error”. It still produces the item in the collection I assigned it to, but the item is untitled and empty (no Dublin Core data, no Item Type Metadata, no Tags, and no associated File).
What am I doing wrong?