now that i have commited the bug report, i took the time to read the exception 
log thoroughly and so i found out, that it was the damn ubuntu packaged sup-mail 
that interfered with the git version. after removing it, all is working well 
again.

I'm running sup with the ncurses patch as specified in 
http://sup.rubyforge.org/wiki/wiki.pl?UTF8 
when i try to save the modified index with $ sup just crashes and leaves 
following exception behind: (also in exception log)


--- NoMethodError from thread: saving thread
undefined method `save_state' for #<Redwood::Thread:0x7f684ef5f998>
/usr/lib/ruby/1.8/sup/modes/thread-index-mode.rb:480:in `actually_save'
./lib/sup/hook.rb:122:in `each_with_index'
/usr/lib/ruby/1.8/sup/modes/thread-index-mode.rb:478:in `each'
/usr/lib/ruby/1.8/sup/modes/thread-index-mode.rb:478:in `each_with_index'
/usr/lib/ruby/1.8/sup/modes/thread-index-mode.rb:478:in `actually_save'
./lib/sup/buffer.rb:721:in `say'
./lib/sup/util.rb:559:in `send'
./lib/sup/util.rb:559:in `method_missing'
/usr/lib/ruby/1.8/sup/modes/thread-index-mode.rb:477:in `actually_save'
/usr/lib/ruby/1.8/sup/modes/thread-index-mode.rb:472:in `synchronize'
/usr/lib/ruby/1.8/sup/modes/thread-index-mode.rb:472:in `actually_save'
/usr/lib/ruby/1.8/sup/modes/thread-index-mode.rb:465:in `save'
./lib/sup.rb:78:in `reporting_thread'
./lib/sup.rb:76:in `initialize'
./lib/sup.rb:76:in `new'
./lib/sup.rb:76:in `reporting_thread'
/usr/lib/ruby/1.8/sup/modes/thread-index-mode.rb:465:in `save'
./lib/sup/mode.rb:51:in `send'
./lib/sup/mode.rb:51:in `handle_input'
./lib/sup/buffer.rb:272:in `handle_input'
bin/sup:276