This addresses broadcast wave files importing into Premiere with timecode set to 00:00:00:00 instead of the embeded value:
I have heard other people mentioning this and I wanted to let everyone know what fixed the WAV TC issue for me (windows 7 64bit). After importing the WAV file (DO NOT CLICK ON IT if you are using a OSX), and after it creates the PEK file, alt+tab or cmd+tab into another app, then back in Premiere. This updates the TC on my system. Hope that helps for now.