+0 The Web 2.0 scientific calculator using hyphen-minus sign (U+002D) on the button, but it looks a bit short when comparing to the plus sign. I suggest using U+2212 (−, %amp;minus;) instead for sidign consistency.
+150 Agreed, but does it really matter, I mean, its still working, If it bothers you that much, send a message to the admin console.
