I was tweaking my CV and hit edit on one of my previous jobs. All my previous info filled out in the form but the responsibilities box was blank. I was uncertain what was going to happen so I backed up the job responsibilities into a word doc and hit submit. Low and behold yup in erased everything under that field. Now I'll have to restore the section from my backup. Sad panda :(.
My cv is at http://careers.stackoverflow.com/dougturnbull if it helps.
I'm editing it in Chrome "13.0.782.220 m" (on Windows 7). Editing in IE9 works fine.