IE10 document.write of a remote script causes "Bad script nesting or script finished twice"

[jnewman]

I believe this has the same root cause as cujojs/curl#131. When I add a test case w/ write contents like:

<script>document.write('<script type=\"text/javascript\" src=\"remote/write-using-query-string.js?k=1&k2=2\"><\\/script>')<\/script>

I get the nesting error. This is b/c the inner script returns in the same tick when it's already in the cache, which causes the script stack to encounter the inner script, but expect the outer.