spec/Overview.html 1.1105 1915 make some notes about window.location ne

make some notes about window.location near about:blank (whatwg r1915)

Diffs for this change per section: 
  assign(url)
  http://people.w3.org/mike/diffs/html5/spec/Overview.1.1105.html#assign
  replace(url)
  http://people.w3.org/mike/diffs/html5/spec/Overview.1.1105.html#replace

Cumulative diff: http://people.w3.org/mike/diffs/html5/spec/Overview.diff.html

http://dev.w3.org/cvsweb/html5/spec/Overview.html?r1=1.1104&r2=1.1105&f=h

http://html5.org/tools/web-apps-tracker?from=1914&to=1915

===================================================================
RCS file: /sources/public/html5/spec/Overview.html,v
retrieving revision 1.1104
retrieving revision 1.1105
diff -u -d -r1.1104 -r1.1105
--- Overview.html	23 Jul 2008 21:54:09 -0000	1.1104
+++ Overview.html	23 Jul 2008 22:06:43 -0000	1.1105
@@ -34823,7 +34823,12 @@
   <p>When the <dfn id=assign title=dom-location-assign><code>assign(<var
    title="">url</var>)</code></dfn> method is invoked, the UA must <a
    href="#navigate">navigate</a> the <a href="#browsing1">browsing
-   context</a> to the specified <var title="">url</var>.
+   context</a> to the specified <var title="">url</var>.</p>
+  <!-- XXX browsers seem to
+  treat this as having <span>replacement enabled</span> if the
+  browsing context has only one entry and that entry is about:blank.
+  IE and Firefox only seem to treat it that way if the DOM is still a
+  virgin DOM; Safari doesn't check that. -->
 
   <p>When the <dfn id=replace title=dom-location-replace><code>replace(<var
    title="">url</var>)</code></dfn> method is invoked, the UA must <a