I found a glitch that makes it so that you -permanently- (until it's fixed) ignore yourself.
If you send yourself mail (such like a memo to yourself) and click "complain" you have the option of ignoring yourself. If you decide to click to ignore yourself, the mail will instantly vanish and in blue text it will say "Ignoring __________(your ingame name)".
This would be fine and all but, since you're ignoring yourself, you can't receive mail from yourself to un-do this and typing both "/ignore _____" or "/unignore________" will both result in blue text stating: "You cannot ignore yourself.".
Effect: Whenever you type/speak in public (not a /tell) you will not be able to see your own typing (however others around you WILL be able to see it). As well as this, your typing is not logged in chat.
I found this to be a neat little glitch, but I hope that it will be fixed soon, just to ensure my sanity xD
/ignore should show the you cannot ignore yourself message, as well as fixing this glitch, but /unignore shouldn't prevent unignoring, ever, to prevent worst-case-scenario bugs involving ignoring. Just saying.
As to your bug, i'm afraid you're going to have to deal with it until the devs themselves fix it, as I don't think there is ANY way to unignore yourself at all.
If you still have the original email, you could try ignoring yourself again and see what it does.