[css-d] Float problem (bug?) only in Opera and IE

You'll see in http://www.spitzer.us/daryl/Daryl_Spitzer_resume.html that in Opera (9.0.2) and IE (6.0) that the first date and city under "Experience" and the word "ongoing" under "Education" float up too high. This is strange, because they're the same class as the ones below, which are fine. And

[css-d] Floated text overlaps in IE 6

I've been unable to figure out what is causing the floated text (in divs) in http://www.spitzer.us/daryl/Daryl_Spitzer_resume.html (and http://www.spitzer.us/daryl/) to overlap in Microsoft Internet Explorer 6.0. I welcome any advice. -- Daryl Sp