The page for showing topics, viewtopic_body.tpl contains the buttons that are displayed below posts. I call these post buttons. Theres a post button for ICQ, and in the default subSilver template theres also a snippet for JavaScript code that shows a users ICQ online status by overlaying it with a green ICQ flower.

The same code is used in profile_view_body.tpl to display the users ICQ online status.

If you redesign this post button you may either have to remove or edit this code. Its a simple piece of JavaScript so remove all the code between the <script></script> tags, remove the <noscript> and </noscript> and only keep the template variable placeholder for the image.