Looks like there is still something wrong with rendering .jpeg files in Graph view.
Here is an example: I created new vault with five jpeg files and one note with links to all that files.
All the images are successfully displayed in Preview mode:
And here is how it looks in Graph view:
Bug? Here is the link to the test vault in question.
- Operating system: macOS Big Sur
- Obsidian version: 0.8.1, no CSS