When I 'insert a picture from file' all goes perfectly. BUT (had to be one of them!)
Sometimes I have go out of TC and modify that picture file and save it as the same file name.
When I next delete the picture and do an insert using the same file name, TC sees it has been already loaded and just reloads the old file. TC must have a copy squirreled away. The preview shows the new file.
If I restart TC all works well. Is there any way to not have to restart TC?