Comment 1 for bug 827041

Hi, James,

This means the index file is truncated (bug 413340), either on your local disk or on Launchpad or as it as seen through the proxy.

Have a look for that file in your local .bzr/ directory; if it has size zero then I recommend you get a fresh checkout.

Otherwise, I would recommend you get a checkout over ssh which should avoid problems with the ssh proxy.