If anyone defined a color for the font of their signature in the past, you may want to double-check this as some may blend in too much, jump out, etc with the new color scheme. I had applied a gray shade to mine so that it didn't stand out against the post/comment and now it looked way too light.
You can see the difference between the font in the signature of this post vs the one in post # 11 up above. I also changed the fontface to Tahoma.