diff --git a/runtime/syntax/haml.vim b/runtime/syntax/haml.vim
index 395600a..bb144ba 100644
--- a/runtime/syntax/haml.vim
+++ b/runtime/syntax/haml.vim
@@ -1,7 +1,8 @@
 " Vim syntax file
 " Language:     Haml
-" Maintainer:   Tim Pope <vimNOSPAM@tpope.info>
+" Maintainer:   Tim Pope <vimNOSPAM@tpope.org>
 " Filenames:    *.haml
+" Last Change:	2010 May 21
 
 if exists("b:current_syntax")
   finish
@@ -20,46 +21,58 @@
 
 syn case match
 
-syn cluster hamlComponent    contains=hamlAttributes,hamlClassChar,hamlIdChar,hamlObject,hamlDespacer,hamlSelfCloser,hamlRuby,hamlPlainChar,hamlInterpolatable
-syn cluster hamlEmbeddedRuby contains=hamlAttributes,hamlObject,hamlRuby,hamlRubyFilter
+syn region  rubyCurlyBlock   start="{" end="}" contains=@hamlRubyTop contained containedin=rubyInterpolation
+syn cluster hamlRubyTop add=rubyCurlyBlock
+
+syn cluster hamlComponent    contains=hamlAttributes,hamlAttributesHash,hamlClassChar,hamlIdChar,hamlObject,hamlDespacer,hamlSelfCloser,hamlRuby,hamlPlainChar,hamlInterpolatable
+syn cluster hamlEmbeddedRuby contains=hamlAttributesHash,hamlObject,hamlRuby,hamlRubyFilter
 syn cluster hamlTop          contains=hamlBegin,hamlPlainFilter,hamlRubyFilter,hamlSassFilter,hamlComment,hamlHtmlComment
 
-syn match   hamlBegin "^\s*[<>&]\@!" nextgroup=hamlTag,hamlAttributes,hamlClassChar,hamlIdChar,hamlObject,hamlRuby,hamlPlainChar,hamlInterpolatable
+syn match   hamlBegin "^\s*\%([<>]\|&[^=~ ]\)\@!" nextgroup=hamlTag,hamlClassChar,hamlIdChar,hamlRuby,hamlPlainChar,hamlInterpolatable
 
 syn match   hamlTag        "%\w\+" contained contains=htmlTagName,htmlSpecialTagName nextgroup=@hamlComponent
-syn region  hamlAttributes matchgroup=hamlAttributesDelimiter start="{" end="}" contained contains=@hamlRubyTop nextgroup=@hamlComponent
-syn region  hamlObject     matchgroup=hamlObjectDelimiter   start="\[" end="\]" contained contains=@hamlRubyTop nextgroup=@hamlComponent
+syn region  hamlAttributes     matchgroup=hamlAttributesDelimiter start="(" end=")" contained contains=htmlArg,hamlAttributeString,hamlAttributeVariable,htmlEvent,htmlCssDefinition nextgroup=@hamlComponent
+syn region  hamlAttributesHash matchgroup=hamlAttributesDelimiter start="{" end="}" contained contains=@hamlRubyTop nextgroup=@hamlComponent
+syn region  hamlObject         matchgroup=hamlObjectDelimiter     start="\[" end="\]" contained contains=@hamlRubyTop nextgroup=@hamlComponent
 syn match   hamlDespacer "[<>]" contained nextgroup=hamlDespacer,hamlSelfCloser,hamlRuby,hamlPlainChar,hamlInterpolatable
 syn match   hamlSelfCloser "/" contained
 syn match   hamlClassChar "\." contained nextgroup=hamlClass
-syn match   hamlIdChar    "#"  contained nextgroup=hamlId
+syn match   hamlIdChar "#{\@!" contained nextgroup=hamlId
 syn match   hamlClass "\%(\w\|-\)\+" contained nextgroup=@hamlComponent
 syn match   hamlId    "\%(\w\|-\)\+" contained nextgroup=@hamlComponent
 syn region  hamlDocType start="^\s*!!!" end="$"
 
-syn region  hamlRuby   matchgroup=hamlRubyOutputChar start="[=~]" end="$" contained contains=@hamlRubyTop keepend
-syn region  hamlRuby   matchgroup=hamlRubyChar       start="-"    end="$" contained contains=@hamlRubyTop keepend
+syn region  hamlRuby   matchgroup=hamlRubyOutputChar start="[!&]\==\|\~" skip=",\s*$" end="$" contained contains=@hamlRubyTop keepend
+syn region  hamlRuby   matchgroup=hamlRubyChar       start="-"           skip=",\s*$" end="$" contained contains=@hamlRubyTop keepend
 syn match   hamlPlainChar "\\" contained
-syn region hamlInterpolatable matchgroup=hamlInterpolatableChar start="==" end="$" keepend contained contains=hamlInterpolation
-syn region hamlInterpolation matchgroup=hamlInterpolationDelimiter start="#{" end="}" contained contains=@hamlRubyTop
+syn region hamlInterpolatable matchgroup=hamlInterpolatableChar start="!\===\|!=\@!" end="$" 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 match  hamlInterpolationEscape "\\\@<!\%(\\\\\)*\\\%(\\\ze#{\|#\ze{\)"
 syn region hamlErbInterpolation matchgroup=hamlInterpolationDelimiter start="<%[=-]\=" end="-\=%>" contained contains=@hamlRubyTop
 
-syn match   hamlHelper  "\<action_view?\|\.\@<!\<\%(flatten\|open\|puts\)" contained containedin=@hamlEmbeddedRuby,@hamlRubyTop,rubyInterpolation
-syn keyword hamlHelper   capture_haml find_and_preserve  html_attrs init_haml_helpers list_of preced preserve succeed surround tab_down tab_up page_class contained containedin=@hamlEmbeddedRuby,@hamlRubyTop,rubyInterpolation
+syn region  hamlAttributeString start=+\%(=\s*\)\@<='+ skip=+\%(\\\\\)*\\'+ end=+'+ contains=hamlInterpolation,hamlInterpolationEscape
+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 cluster hamlHtmlTop contains=@htmlTop,htmlBold,htmlItalic,htmlUnderline
-syn region  hamlPlainFilter matchgroup=hamlFilter start="^\z(\s*\):\%(plain\|preserve\|erb\|redcloth\|textile\|markdown\)\s*$" end="^\%(\z1 \)\@!" contains=@hamlHtmlTop,rubyInterpolation
-syn region  hamlEscapedFilter matchgroup=hamlFilter start="^\z(\s*\):\%(escaped\)\s*$" end="^\%(\z1 \)\@!" contains=rubyInterpolation
-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  hamlSassFilter  matchgroup=hamlFilter start="^\z(\s*\):sass\s*$" end="^\%(\z1 \)\@!" contains=@hamlSassTop
+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  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  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
-syn region  hamlCssBlock        start="^\z(\s*\)%style" nextgroup=@hamlComponent,hamlError end="^\%(\z1 \)\@!" contains=@hamlTop,@htmlCss keepend
+syn region  hamlJavascriptBlock start="^\z(\s*\)%script" nextgroup=@hamlComponent,hamlError end="^\%(\z1 \| *$\)\@!" contains=@hamlTop,@htmlJavaScript keepend
+syn region  hamlCssBlock        start="^\z(\s*\)%style" nextgroup=@hamlComponent,hamlError  end="^\%(\z1 \| *$\)\@!" contains=@hamlTop,@htmlCss keepend
 syn match   hamlError "\$" contained
 
-syn region  hamlComment     start="^\z(\s*\)-#" end="^\%(\z1 \)\@!" contains=rubyTodo
-syn region  hamlHtmlComment start="^\z(\s*\)/" end="^\%(\z1 \)\@!" contains=@hamlTop,rubyTodo
+syn region  hamlComment     start="^\z(\s*\)-#" end="^\%(\z1 \| *$\)\@!" contains=rubyTodo
+syn region  hamlHtmlComment start="^\z(\s*\)/"  end="^\%(\z1 \| *$\)\@!" contains=@hamlTop,rubyTodo
 syn match   hamlIEConditional "\%(^\s*/\)\@<=\[if\>[^]]*]" contained containedin=hamlHtmlComment
 
 hi def link hamlSelfCloser             Special
@@ -74,6 +87,9 @@
 hi def link hamlRubyOutputChar         hamlRubyChar
 hi def link hamlRubyChar               Special
 hi def link hamlInterpolationDelimiter Delimiter
+hi def link hamlInterpolationEscape    Special
+hi def link hamlAttributeString        String
+hi def link hamlAttributeVariable      Identifier
 hi def link hamlDocType                PreProc
 hi def link hamlFilter                 PreProc
 hi def link hamlAttributesDelimiter    Delimiter
@@ -86,4 +102,8 @@
 
 let b:current_syntax = "haml"
 
+if main_syntax == "haml"
+  unlet main_syntax
+endif
+
 " vim:set sw=2: