You cannot get them to go way!
They just keep migrating back in, even when you don't see them any more - there they are again.
Those dts's are indeed the gremlins.
I fixed them by adding a new button to my systems page and making the appearance look like the supplied firmware button then I put the new button in the same place as the firmware button. I was then able to lable it with the graphics of my choice.
If you want a sample of my pcf to see how I did this.
[Link: mywebpages.comcast.net]The downside is that the buttons do not light up when the firmware buttons are pressed. But labeling them was crucial to my whole pcf design theme.