Regarding the SVG in Internet Explorer, you will need a plugin. I tried
the Ssrc SVG Plugin and it worked fine.
I used the version 6 installer. Here's the direct download link:
After you install the plugin, it will not run until it has permission.
The first time it tries to load, a message will appear at the top of the
browser. Click on the message and select the option that allows it to
run on all web pages.
You will need to manually change the sign color to "ffffff" and the
background color to "000000". The high contrast option does not allow a
white background on SVG documents and manually changes them to black.
So unless you set these values, you will not see the sign image.