Start using 'syntax sync fromstart' until we find a better way ...

See also issue #2 on GitHub:
  #2

Author: xolox

autoload/xolox/notes.vim

@@ -1,12 +1,12 @@
 " Vim auto-load script
 " Author: Peter Odding <peter@peterodding.com>
-" Last Change: October 20, 2014
+" Last Change: November 3, 2014
 " URL: http://peterodding.com/code/vim/notes/
 
 " Note: This file is encoded in UTF-8 including a byte order mark so
 " that Vim loads the script using the right encoding transparently.
 
-let g:xolox#notes#version = '0.28'
+let g:xolox#notes#version = '0.28.1'
 let g:xolox#notes#url_pattern = '\<\(mailto:\|javascript:\|\w\{3,}://\)\(\S*\w\)\+/\?'
 let s:scriptdir = expand('<sfile>:p:h')
 

syntax/notes.vim

@@ -1,6 +1,6 @@
 " Vim syntax script
 " Author: Peter Odding <peter@peterodding.com>
-" Last Change: July 7, 2014
+" Last Change: November 3, 2014
 " URL: http://peterodding.com/code/vim/notes/
 
 " Note: This file is encoded in UTF-8 including a byte order mark so
@@ -11,6 +11,14 @@ if exists('b:current_syntax')
   finish
 endif
 
+" Tell Vim to start redrawing by rescanning all previous text. This isn't
+" exactly optimal for performance but it enables accurate syntax highlighting.
+" Ideally we'd find a way to get accurate syntax highlighting without the
+" nasty performance implications, but for now I'll accept the performance
+" impact in order to have accurate highlighting. For more discussion please
+" refer to https://github.com/xolox/vim-notes/issues/2.
+syntax sync fromstart
+
 " Check for spelling errors in all text.
 syntax spell toplevel