more annoying is when you have the fuel pump changed and it is not set in properly so that when the tank is full, the needle sits below the 3/4 full mark.
Mine did something similar except (at first) it wouldn't go below 1/4. Although the light would come on but the needle still showed 3/4. I shat myself when I was in the middle of no where when it first happened. I think it has strangely fixed itself though.