Sometimes, when I'm typing in the body of the message editor, the cursor disappears. I can click in the Title field and get a cursor, I can click in the Tags field and get a cursor, I can highlight text within the message editor. But I can't get a visible cursor inside the "body" of the message editor. When I type, text is alway added at the end of the last sentence.
I can work around the problem by discarding the message and doing the Reply or Post New Thread process over again. I'm using Firefox 3.5.15 on Fedora Core 12 Linux. The same thing happens sometimes when I use the Opera browser. I haven't noticed this problem on the forums at other websites where I post.