(Chrome) Can't upgrade from TW 2.6.2 to 2.6.5

[Rich]

I'm running Chrome 16.0.912.77 (which is latest at the time of this
post) on Windows 7 Professional SP1.

My Tiddlywiki is version 2.6.2. 2.6.5 is the current version of
Tiddlywiki. When I select Backstage->Upgrade and click the Upgrade
button I receive a pop-up that says "Error with the new core code."

Any suggestions?

[HansBKK]

I'm sticking to Firefox v3.6 portable for my Tiddlywiki's. . .

[urochordate]

I have the same problem in firefox 10.01
The tiddlywiki official website said to use the import function when
upgrading versions before and including 2.6.3.

However the import failed too.
After I browse a local file (not on a web server), there was nothing
happen but the error massage:
"Error retrieving tiddlers from url, please ensure this url exists and
is CORS enabled."

Does anyone know how to fix it?
Thanks a lot!

[urochordate]

On, I find how to do this from this post:
Unable to Import into TW2.4.0
http://groups.google.com/group/tiddlywiki/browse_thread/thread/c352134864517e8a/14c1f882df2d2e72?lnk=gst&q=import#14c1f882df2d2e72