Originally posted by Skinman:

I noticed that too. Sad. But here is what I did to center the text. Not I have a 1x1 wall either side of my chest and two 1x1 floor pieces above the chest.
1. Remove chest and sign.
2. Place a 1m pole using left shift to be centered where the chest will go but recessed just a bit.
3. Place the sign centered on the 1m pole.
4. Remove the 1m pole which will leave the sign floating where it was placed.
5. Set the text for the sign.
6. Place the chest back so the text just shows through.

And ta-dar! You are back in business.