Today I started to write a post while on my FreeBSD box. I'm using Firefox 3.0 and I noticed that TinyMCE is only showing me the HTML view of the editor. I cannot click visual at all.
On Windows with Firefox 3.0 the same works without problems, so it is not the files in my install.
When I went to the TinyMCE homepage I went to the 'full featured example' page and that worked without any problems.
Just checked with Opera 9.63 as well, same problem. It's like something is detecting 'freebsd' and not allowing to use the visual mode.