Comment 1:

Please, provide a small program to demonstrate the issue. And tell us what your program
outputs and what you think it should output instead. Thank you.
Alex

Status changed to WaitingForReply.

Comment 2:

Labels changed: added go1.3maybe.

Comment 3:

Labels changed: added priority-later, packagebug, removed priority-triage.

Comment 4:

Labels changed: added release-none, removed go1.3maybe.

Comment 5:

Labels changed: added repo-main.

Comment 6 by germanium@gmx.us:

I have the same issue on Linux.
My distribution doesn't include a "mime.types" file therefore http.FileServer gives me a
mime type of "text/xml; charset=utf-8" for .svg files.
Firefox refuses to display .svg files in <img> tags unless the mime type is
"image/svg+xml".
I think it would be nice to have ".svg" in mime.mimeTypes if it is appropriate because
it is useful to display static web pages correctly.
Thanks, L

Comment 7 by iacob.campia:

You can add a mime.AddExtensionType(".svg", "image/svg+xml") line (and import "mime")
and all is good. 
I had the same problem on Centos. But not because the mime file was missing, but because
it expects to start with <!DOCTYPE svg and most .svg files start with <?xml
version="1.0 ?><!DOCTYPE svg ....

Comment 8 by treeder:

This happens on Google App Engine too using http.ServeFile, returns svg files with
content-type text/xml. I've even done what was suggested above, adding
mime.AddExtensionType(".svg", "image/svg+xml"), but that doesn't work.

Comment 9 by treeder:

Same things happens on App Engine, adding the mime-type as above:
mime.AddExtensionType(".svg", "image/svg+xml"), seems to have fixed it.

This issue seems to have already been fixed by commit 21e47d8 through CL https://go-review.googlesource.com/#/c/7942. The CL just hadn't mentioned it.
Proof that it works here http://play.golang.org/p/gN51TN-BzZ.