I have developed an advanced version of the tinymce editor within wordpress. I have had a few reports of your icon button within the editor not showing up when my plugin is installed with yours.
I was hoping you might be able to work with me on this and see why it might be happening. I run wordpress 3.3. After I heard about this problem, I downloaded your plugin to test, and the button showed up immediately with both plugins installed. As a matter of fact, it works fine on all three of my test sites (various themes).
Any help would be most appreciated. My plugin can be downloaded here: