What font for the unicode used at PF?

[rcgldr]

I'm running IE8. What font do I need to see all the unicode symbols used here at Physics Forums? I'm currently using Times New Roman, which gets most of them, but I still see occasional square blocks.

 

[Borek]

I think you will always get some square blocks, as I doubt PF filters the content the people post - as long as it is not part of the input sanitizing. I am using Arial and I don't remember seeing squares at PF - but first, I am not sure it is the standard Microsoft font file as I remember needing some additional characters and googling for the extended font, second, just because I don't remember something doesn't mean much, as my wife would be happy to confirm.