Mac-qt ships with very old cursor images

I couldn't figure out where the old-style B&W spin cursor and wrist-watch wait cursor where coming from in my Qt app deployed to OSX. These are being displayed along with the conventional 'spinning color wheel' during wait operations.

I had assumed that these were coming from Carbon but Qt now uses Cocoa as it's backend by default. I later discovered that these cursors are hard-coded into the Qt under:

<qt source dir>/src/gui/mac/images

These cursors look very, very old (as if there were taken from the original 1984 mac) and look very out of place on OSX in 2012. Updating them to more contemporary designs would help but Qt really shouldn't be shipping with cursors at all and should rely on the OS to display them as required.