Rails - 2.1.8: ignoring wrong elements is deprecated

[npham1]

ACPK-Air-3% find . -name *.erb -print | sed 'p;s/.erb$/.haml/' | xargs -n2 html2haml
/Users/andrewcharleskelley/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/html2haml-1.0.1/lib/html2haml/html.rb:346: warning: wrong element type nil at 0 (expected array)
/Users/andrewcharleskelley/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/html2haml-1.0.1/lib/html2haml/html.rb:346: warning: ignoring wrong elements is deprecated, remove them explicitly
/Users/andrewcharleskelley/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/html2haml-1.0.1/lib/html2haml/html.rb:346: warning: this causes ArgumentError in the next release
/Users/andrewcharleskelley/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/html2haml-1.0.1/lib/html2haml/html.rb:346: warning: wrong element type nil at 0 (expected array)
/Users/andrewcharleskelley/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/html2haml-1.0.1/lib/html2haml/html.rb:346: warning: ignoring wrong elements is deprecated, remove them explicitly
/Users/andrewcharleskelley/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/html2haml-1.0.1/lib/html2haml/html.rb:346: warning: this causes ArgumentError in the next release
/Users/andrewcharleskelley/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/html2haml-1.0.1/lib/html2haml/html.rb:346: warning: wrong element type nil at 0 (expected array)
/Users/andrewcharleskelley/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/html2haml-1.0.1/lib/html2haml/html.rb:346: warning: ignoring wrong elements is deprecated, remove them explicitly
/Users/andrewcharleskelley/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/html2haml-1.0.1/lib/html2haml/html.rb:346: warning: this causes ArgumentError in the next release