Here's another example. I've just written a message for whose subject line I wanted to quote something from a web page. I found the phrase "a few kilobytes of RAM and no disk at all" (no quotation marks) -- http://www.dunkels.com/adam/contiki/apps/webbrowser-text.html (Linux-irrelevant, but recommended!) -- and copied it to the clipboard via Ctrl-C. Moving to the subject box for a new message in Mozilla, I first typed a quotation mark, then hit Ctrl-V -- and found the cursor not at the end of the block as expected, but in the middle of "at". I hit another quotation mark; this didn't appear anywhere (either to close ". . . at all", where it should have appeared, or in the middle). I moved the cursor to the right (without clicking it), and the second quotation mark magically appeared in the right place. I've just done this a second time; exactly the same thing happened.