Studio 11.10 (xcfe) desktop does not show file content
I've just switched to Studio 11.10 (xcfe desktop) from Ubuntu 10.10 and I like it very much. One problem I have is that (no matter which setting I have tried) the desktop icons only show the title of the item plus an iconic indicator of the file type but do not show the actual content of the file. Eg an image only shows as a generic image icon (a balloon against a blue sky) and not the actual (minimised) image that I have been used to in 10.10. I've attached a screenshot.
Can anyone please help me find the right desktop setting?