A really strange selector bug came up the other night when I was helping a user out on Stack Overflow. I have put together an example of how it fails here:

http://pixelgraphics.us/jq/bugs/selector.html

But in summary, whenever you combine the > selector with a scoped select $( "> img[src='...']", scope) or use $(parent).children("img[src='...']") the selector will fail to properly match the element.

If you supply $= to the attribute selector on the same exact calls, the call succeeds. If you use $("parent > img[src='...']") the call also successfully matches the element.

Please let me know if you need more information.