Ruby 1.9.2 Error: ArgumentError - invalid byte sequence in US-ASCII:

[etagwerker]

I tried to run showoff on Heroku on bamboo-mri-1.9.2 and I found this issue:
#93

Upon further review, I found this error:

ArgumentError - invalid byte sequence in US-ASCII:
/usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/showoff-0.7.0/lib/showoff.rb:182:in gsub' /usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/showoff-0.7.0/lib/showoff.rb:182:inupdate_p_classes'
/usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/showoff-0.7.0/lib/showoff.rb:175:in block in process_markdown' /usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/showoff-0.7.0/lib/showoff.rb:146:ineach'
/usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/showoff-0.7.0/lib/showoff.rb:146:in process_markdown' /usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/showoff-0.7.0/lib/showoff.rb:283:inblock (2 levels) in get_slides_html'
/usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/showoff-0.7.0/lib/showoff.rb:281:in each' /usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/showoff-0.7.0/lib/showoff.rb:281:inblock in get_slides_html'
/usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/showoff-0.7.0/lib/showoff.rb:272:in each' /usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/showoff-0.7.0/lib/showoff.rb:272:inget_slides_html'
/usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/showoff-0.7.0/lib/showoff.rb:374:in slides' /usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/showoff-0.7.0/lib/showoff.rb:487:inblock in class:ShowOff'
/usr/local/rvm/gems/ruby-1.9.2-p180@showoff/gems/sinatra-1.3.1/lib/sinatra/base.rb:1212:in `call'

I switched to stack bamboo-ree-1.8.7 and everything is alright.

Just wanted to post this to inform that Showoff is not Ruby 1.9.2 yet. The workaround is to use 1.8.7.