I've been working on a new site for a non-profit, and last week their user reported that she cannot see any text in the visual editor window when she goes to edit pages or posts. The first thing I did was to create a new user for her, but she's still seeing the same issue.
She's running Windows XP, and the issue happens both with Firefox 3.6 and IE8. If this helps, here are the plugins I have installed:
Calendar (By Kieran O'Shea)
Simple Post Thumbnails
Wordpress Related Posts
I cannot replicate the issue on my end, I am running Windows 7.
Thanks in advance!