Installed Source tree from DMG downloaded from http://www.sourcetreeapp.com/download/

The app icon is fine in applications, but once opened there is only a "blank" icon in dock and application switcher. see attached img. of dock.

I have used Sourcetree thru all the dev. releases of OSX 10.9 and it has not shown this bug there.

I have tried uninstalling sourcetree and all references without success. (Using appdelete to remove all references that sourcetree might create)