With the new feature to use a temp output dir, the script tag has an odd {{src}} attribute
<script src="/main.js" type="text/javascript"></script>
Repro:
clj -Srepro -m cljs.main
If, on the other hand you do
clj -Srepro -m cljs.main -d out -r
you get
<script src="out/main.js" type="text/javascript"></script>