diff --git a/syntax/haml.vim b/syntax/haml.vim
index f49eaca..5f2f99f 100644
--- a/syntax/haml.vim
+++ b/syntax/haml.vim
@@ -21,7 +21,7 @@ syn include @hamlRubyTop syntax/ruby.vim
 
 syn case match
 
-syn region  rubyCurlyBlock   start="{" end="}" contains=@hamlRubyTop contained containedin=rubyInterpolation
+syn region  rubyCurlyBlock   start="{" end="}" contains=@hamlRubyTop contained
 syn cluster hamlRubyTop add=rubyCurlyBlock
 
 syn cluster hamlComponent    contains=hamlAttributes,hamlAttributesHash,hamlClassChar,hamlIdChar,hamlObject,hamlDespacer,hamlSelfCloser,hamlRuby,hamlPlainChar,hamlInterpolatable
@@ -47,7 +47,7 @@ syn region  hamlRuby   matchgroup=hamlRubyChar       start="-"           skip=",
 syn match   hamlPlainChar "\\" contained
 syn region hamlInterpolatable matchgroup=hamlInterpolatableChar start="!\===\|!=\@!" end="$" keepend contained contains=hamlInterpolation,hamlInterpolationEscape,@hamlHtmlTop
 syn region hamlInterpolatable matchgroup=hamlInterpolatableChar start="&==\|&=\@!"   end="$" keepend contained contains=hamlInterpolation,hamlInterpolationEscape
-syn region hamlInterpolation matchgroup=hamlInterpolationDelimiter start="#{" end="}" contains=@hamlRubyTop
+syn region hamlInterpolation matchgroup=hamlInterpolationDelimiter start="#{" end="}" contains=@hamlRubyTop containedin=javascriptStringS,javascriptStringD
 syn match  hamlInterpolationEscape "\\\@<!\%(\\\\\)*\\\%(\\\ze#{\|#\ze{\)"
 syn region hamlErbInterpolation matchgroup=hamlInterpolationDelimiter start="<%[=-]\=" end="-\=%>" contained contains=@hamlRubyTop
 
@@ -55,16 +55,16 @@ syn region  hamlAttributeString start=+\%(=\s*\)\@<='+ skip=+\%(\\\\\)*\\'+ end=
 syn region  hamlAttributeString start=+\%(=\s*\)\@<="+ skip=+\%(\\\\\)*\\"+ end=+"+ contains=hamlInterpolation,hamlInterpolationEscape
 syn match   hamlAttributeVariable "\%(=\s*\)\@<=\%(@@\=\|\$\)\=\w\+" contained
 
-syn match   hamlHelper  "\<action_view?\|\<block_is_haml?\|\<is_haml?\|\.\@<!\<flatten" contained containedin=@hamlEmbeddedRuby,@hamlRubyTop,rubyInterpolation
-syn keyword hamlHelper   capture_haml escape_once find_and_preserve haml_concat haml_indent haml_tag html_attrs html_esape init_haml_helpers list_of non_haml precede preserve succeed surround tab_down tab_up page_class contained containedin=@hamlEmbeddedRuby,@hamlRubyTop,rubyInterpolation
+syn match   hamlHelper  "\<action_view?\|\<block_is_haml?\|\<is_haml?\|\.\@<!\<flatten" contained containedin=@hamlEmbeddedRuby,@hamlRubyTop
+syn keyword hamlHelper   capture_haml escape_once find_and_preserve haml_concat haml_indent haml_tag html_attrs html_esape init_haml_helpers list_of non_haml precede preserve succeed surround tab_down tab_up page_class contained containedin=@hamlEmbeddedRuby,@hamlRubyTop
 
 syn cluster hamlHtmlTop contains=@htmlTop,htmlBold,htmlItalic,htmlUnderline
-syn region  hamlPlainFilter      matchgroup=hamlFilter start="^\z(\s*\):\%(plain\|preserve\|redcloth\|textile\|markdown\|maruku\)\s*$" end="^\%(\z1 \| *$\)\@!" contains=@hamlHtmlTop,rubyInterpolation
-syn region  hamlEscapedFilter    matchgroup=hamlFilter start="^\z(\s*\):\%(escaped\|cdata\)\s*$"    end="^\%(\z1 \| *$\)\@!" contains=rubyInterpolation
+syn region  hamlPlainFilter      matchgroup=hamlFilter start="^\z(\s*\):\%(plain\|preserve\|redcloth\|textile\|markdown\|maruku\)\s*$" end="^\%(\z1 \| *$\)\@!" contains=@hamlHtmlTop,hamlInterpolation
+syn region  hamlEscapedFilter    matchgroup=hamlFilter start="^\z(\s*\):\%(escaped\|cdata\)\s*$"    end="^\%(\z1 \| *$\)\@!" contains=hamlInterpolation
 syn region  hamlErbFilter        matchgroup=hamlFilter start="^\z(\s*\):erb\s*$"        end="^\%(\z1 \| *$\)\@!" contains=@hamlHtmlTop,hamlErbInterpolation
 syn region  hamlRubyFilter       matchgroup=hamlFilter start="^\z(\s*\):ruby\s*$"       end="^\%(\z1 \| *$\)\@!" contains=@hamlRubyTop
-syn region  hamlJavascriptFilter matchgroup=hamlFilter start="^\z(\s*\):javascript\s*$" end="^\%(\z1 \| *$\)\@!" contains=@htmlJavaScript,rubyInterpolation keepend
-syn region  hamlCSSFilter        matchgroup=hamlFilter start="^\z(\s*\):css\s*$"        end="^\%(\z1 \| *$\)\@!" contains=@htmlCss,rubyInterpolation keepend
+syn region  hamlJavascriptFilter matchgroup=hamlFilter start="^\z(\s*\):javascript\s*$" end="^\%(\z1 \| *$\)\@!" contains=@htmlJavaScript,hamlInterpolation keepend
+syn region  hamlCSSFilter        matchgroup=hamlFilter start="^\z(\s*\):css\s*$"        end="^\%(\z1 \| *$\)\@!" contains=@htmlCss,hamlInterpolation keepend
 syn region  hamlSassFilter       matchgroup=hamlFilter start="^\z(\s*\):sass\s*$"       end="^\%(\z1 \| *$\)\@!" contains=@hamlSassTop
 
 syn region  hamlJavascriptBlock start="^\z(\s*\)%script" nextgroup=@hamlComponent,hamlError end="^\%(\z1 \| *$\)\@!" contains=@hamlTop,@htmlJavaScript keepend