Lots of trouble with front page display

Can I get the technical reasons why there is so much difficulty displaying this social widget on the front page? I’ve been trying to get PITME.com into some semblance of professional shape but haven’t been able to re-author the cheap plugin from scratch just yet. Still, if I know what causes this problem then I can fix it.

Chrome: ok

Firefox: invisible

IE: invisible

The client happens to love the social boxes. I need them to show up on the front page in all browsers, not just Chrome. I have tried regular mode, fix issues mode, and manual placement mode.