This is a critical performance feature that PreloadScanner has. It is quite common for pages to load their CSS using inline stylesheet instead of <link>. Failing to pick up stylesheets early can delay first display time significantly.
Yep. Thanks for filing this bug.
This was taken care of, but it would be nice to have a test for it.
This is tested by: http://trac.webkit.org/browser/trunk/LayoutTests/fast/preloader/style.html