NetBeans HG clone problem on Leopard

I just tried to create clone of main NetBeans repository from Mercurial (OS X Leopard):

hg clone

and go error starting with: Traceback (most recent call last): File "/usr/local/bin/hg", line 18, in mercurial.util.set_binary(fp) ... ValueError: unknown locale: UTF-8

To fix that go to Terminal preferences and there to Settings->Advanced and uncheck 'Set LANG environment variable on startup' or read more at Henrik's blog