1. Open a PDF file in Skim
2. Run UIElementInspector (svailable from http://developer.apple.com/library/mac/#samplecode/UIElementInspector/Introduction/Intro.html\)
3. Highlight some text in the PDF file in skim (^⌘H)
4. Select within the highlighted text
5. Check what UiElementInspector is showing for "AXSelectedText"
AXSelectedText is blank
AXSelected Text should show the correct selected text