html syntax highlighting disable spell check?

[Jiang Qian]

Hi All:
I apologize for breaking the thread. I just share dc's problem about 
syntax highlighting in html and build-in spellchecker: when I edit a
html file spell checking doesn't work, but as soon as I do
syntax off
the spell check works again! Any idea how to remedy it? I compiled vim 7 
from source but did not delete the vim 6 installation from my distro.  
Would that be problem? For some reason for C files and latex files 
syntax highlighting doesn't seems to bother spell check.
Jiang