Are there small artifacts around your text?
I noticed it's caused by the camera being at a coordinate with a float value, like 320.123 instead of just 320. There's an option to snap to pixels in the settings somewhere. It fixed it for me.
I found this out when I made a procedural scroll bar like the one on your browser. At decimal values, the text in my options menu had artifacts, and at the whole number values the text did not.