Slightly larger toolbar icons. Slightly larger than IE 6's would be awesome. Also, an option to select which set you use. I've always liked the large ones (32x32 I think?) as my mouse often slips onto another button.
This is my first time using K-Meleon. Actually, this is my first time using Gecko on Windows. I love Gecko on GNU/Linux because it's just like Mozilla but so much faster and smaller. I tried using Phoenix and I think I'll stick with this.