Hi Joshua,
I changed the strings to a Dean Markley set. What a differenence! First, these strings feel so much better. The D'Addarios were like running your fingers on coarse sandpaper. The DM's are smoother and you don't get anywhere near as much of the screechy sound when moving along the fretboard. Next, the DM's have a mellower sound, which I prefer on a bass. Last, and most importantly, I was able to adjust the truss rod and eliminate all buzzing and that "tapping" sound I was getting as I fretted the strings.
Good stuff! I'm happy with the Fender again.
Paul Mac