Raising a bug because the fix is non-trivial
This appears to be happening again in the orion-1.0 branch (created on 2012-08-29). It can be seen by viewing the index.html in GCLI's root directory.
Looking further, I notice that this works fine when viewing the page in FF15, but is failing for me with Google Chrome (21.0.1180.83 m) and IE9.
Fixed with bug 788486