I found (http://dev.fckeditor.net/wiki/Bugs) and tried to send bug report in https://dev.fckeditor.net/newticket but I've got "TICKET_CREATE privileges are required to perform this operation" So I write my bug report here.
I use Firefox 3.0 under Linux.
(Mozilla/5.0 (X11; U; Linux i686; en-US; rv:126.96.36.199) Gecko/2008071812 Iceweasel/3.0.1 (Parsix-3.0.1-1) )
1. FCKeditor in FF3 shows RTL/LTR buttons but when I'm clicking on this buttons no things happens!
3. All other buttons working well
If I should send you more debugging information (e.g from firebug) or I should send this report to Trac please inform me.
Thanks for FCKEditor
BugReport: RTL don't work in FF3