I've just installed sup from AUR (Archlinux User Repository). I'm trying to run 
sup-config but I'm getting the following error. It may hasve to do with the fact 
that my name contains Unicode characters (and this is how my linux account name, 
not username, is configured):

$ sup-config 
/usr/lib/ruby/gems/1.9.1/gems/sup-0.10.1/lib/sup/person.rb:10:in `strip': 
invalid byte sequence in UTF-8 (ArgumentError)
	from /usr/lib/ruby/gems/1.9.1/gems/sup-0.10.1/lib/sup/person.rb:10:in 
`initialize'
	from /usr/lib/ruby/gems/1.9.1/gems/sup-0.10.1/lib/sup/account.rb:9:in 
`initialize'
	from /usr/lib/ruby/gems/1.9.1/gems/sup-0.10.1/lib/sup/account.rb:53:in 
`new'
	from /usr/lib/ruby/gems/1.9.1/gems/sup-0.10.1/lib/sup/account.rb:53:in 
`add_account'
	from /usr/lib/ruby/gems/1.9.1/gems/sup-0.10.1/lib/sup/account.rb:37:in 
`initialize'
	from /usr/lib/ruby/gems/1.9.1/gems/sup-0.10.1/lib/sup/util.rb:557:in 
`new'
	from /usr/lib/ruby/gems/1.9.1/gems/sup-0.10.1/lib/sup/util.rb:557:in 
`init'
	from /usr/lib/ruby/gems/1.9.1/gems/sup-0.10.1/lib/sup.rb:127:in `start'
	from /usr/lib/ruby/gems/1.9.1/gems/sup-0.10.1/bin/sup-config:149:in 
`<top (required)>'
	from /usr/bin/sup-config:19:in `load'
	from /usr/bin/sup-config:19:in `<main>'