was getting this weird error
=> Booting WEBrick...
.//vendor/rails/actionpack/lib/action_view/base.rb:167:in `const_defined?': wrong constant name .AssetTagHelper (NameError)
from .//vendor/rails/actionpack/lib/action_view/base.rb:167:in `load_helpers'
from .//vendor/rails/actionpack/lib/action_view/base.rb:162:in `load_helpers'
from .//vendor/rails/actionpack/lib/action_view.rb:34
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in `require'
from .//vendor/rails/activesupport/lib/active_support/dependencies.rb:214:in `require'
from .//vendor/rails/actionpack/lib/action_controller.rb:58
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in `require'
from .//vendor/rails/activesupport/lib/active_support/dependencies.rb:214:in `require'
... 8 levels...
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in `require'
from .//vendor/rails/activesupport/lib/active_support/dependencies.rb:214:in `require'
from .//vendor/rails/railties/lib/commands/server.rb:28
from script/server:3
Apple had mounted the drive and created lots of silly ._files in finder.
solved it with the attached patch (ignores all ._blah files)
