I thought it disconcerting that (as pointed out by Kee Hinckley in MacFixit forums:
'I have to say I'm pretty disappointed in the browser writers on this one. This
issue was raised from the very moment that the IDN system was proposed.
It's mentioned in the standards (RFC3490):
"To help prevent confusion between characters that are visually
similar, it is suggested that implementations provide visual
indications where a domain name contains multiple scripts. "
Perhaps the recommendation should have been stronger, but anyone who has
even casually followed the standards process should have been aware of the
issue." '