Well, I did get it working.
Actually, I did see that two different versions of swfobject were being called. Removed one and still had the same problem.
In fact, another issue in FireFox was that the gallery was shrunk down really small -- which I didn't notice since I needed it small, anyway. Client wanted it much bigger, so I reworked the whole template, but couldn't get it bigger.
I rebuilt the page from scratch and tested it every step of the way. What I discovered was that SV doesn't like being stuck in a table. Once I took it out of the table, I could control the size again and it showed up in IE and Safari.
I appreciate the help!