It has been brought to my attention that SimpleMap 1.1 (and 1.1.1) was completely broken in all browsers but Safari. First of all, I’m really sorry about this; second, I’ve got a fix worked out that I will release tonight in 1.1.2. In the meantime, here’s the fix that you can apply yourself:

In js/functions.js, change line 130:

if (!computedStyle) {

to this:

if (!computedStyle || !computedStyle[styleProperty]) {

Again, I’m really sorry about this substantial bug. If this fix doesn’t work for anyone, please let me know.