Mousing over node for summary initially displays main node's image

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Search for "William Shakespeare"
2. Mouse over "Anne Hathaway"
3. Shakespeare's image is displayed instead of Anne Hathaway's
4. Remove mouse from Anne Hathaway, then mouse over again
5. Now the proper image is displayed

Note: this may not repro for the provided query if caching is now working, so 
try to search for something else and repro.

It seems that when an image isn't cached the first time, the preview pane does 
not update the preview image immediately, and sometimes requires you to 
re-hover. 

What is the expected output? What do you see instead?
As soon as the proper image is available it should be displayed. I should never 
see the wrong image for an article on mouse over.

Original issue reported on code.google.com by [email protected] on 9 Mar 2011 at 9:43