The style i can see as a guest on your forum or a different one?
Try the default style or another one for your account. If the problem goes away then it is a problem with the style.
If it is not you can submit a ticket for a help.
Because this is only happening to your account it must be a personal setting. Any other members had this problem? Also check if it happens with all your add-ons disabled.
You can also backtrack it. Did the problem started after installing an add-on or style?