Line Spacing Error

Suddenly today when I try to change the line spacing of text in Photoshop, it doesn't do it and gives me wild range errors. For instance, trying to set the line spacing to 40pt, I'll get a pop up that says "A value between 65.16 Points and 21474836.47 Points is required." Any idea how to fix this? Resetting the character, rebooting the program, etc has not helped.