I have a Image Media Picker and Multiple Image Media Picker in that order on a document type. In the back office im able to pick images and it appears to work fine.
In browser the images are not displayed and instead the following to lines are:
System.Collections.Generic.List`1[Umbraco.Cms.Core.Models.MediaWithCrops]
System.Linq.EmptyPartition`1[Umbraco.Cms.Core.Models.MediaWithCrops]
Images within rich text fields do seem to display fine.
This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/112554-media-picker-doesnt-generate-html