I'm using v3.9, and there seem to be some browser incompatibilities.
It just won't work right on Firefox at all. The home page loads but when you click on any link you just get a blank page returned. No matter whether you click on a category link, product link or the Admin link, you get nothing but a blank page.
On IE8 (yeah, outdated, but I'm not the only one in the world that refuses to upgrade from WinXP) the CSS doesn't seem to work and the page comes up all malformed. You can click on links but the page you get back comes back wonky looking, no matter what you click on.
Seems to work 100% on Chrome, both the Admin section and the store.
Are there a list of known browser incompatibilities for each version of nopCommerce?