[jQuery] append() bug

[jQuery] append() bug

It seems the latest version of jquery has a bug with the append
function. This is my code:
$("#navigation.columnView .siteNode > span,
#navigation.columnView .folderNode > span").append("<div class=
\"expandButton\"></div>");
Three elements are selected, but only one get the div tag appended.
In my cached version, it works fine.
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