When a build detail is displayed (E.g. http://some-jenkins-server/job/some-job/20/)
git checkout revision detail (E.g. Revision: d4b383a9bc7a30a3903bf0e1f48d078fadf0bfd4 origin/HEAD origin/master) has a small git icon next to it. The icon url is wrong so it doesn't display.

Here is the url (/static/7f35c4b3 part repeated twice)
http://.........../static/7f35c4b3/static/7f35c4b3/plugin/git/icons/git-48x48.png
which should be
http://.........../static/7f35c4b3/plugin/git/icons/git-48x48.png