Opera, like Firefox, uses Times New Roman 16 as the default font to display a web page. Why the arrows look lousy in Opera I do not know considering they have the same font. I had changed the default font in my Opera to Georgia 14 - why I don't know, 'cause I can I suppose - and the points look okay.
Also since I have switch back to my laptop from my home PC I have suddenly realised how bad it's screen is too!
I knew this was a mistake; my grip on reality's not too good at the best of times. Glitz, in "The Ultimate Foe"