Guide on how to get rid of a blinking whisper tab without asking other people for pm!
If your tab blinking for no reason drives you crazy, there is something you can do about it. Click on whisper and type: "/w yourname" without quotations and press Space. This will open a whisper box to yourself. Now type something to yourself, wait for it to get back to you and then x out of the whisper box. Voila. No more blinking.
"/w yourname" command is also useful when you want to test filters in chat.
Good luck :)