[Bug-AUCTeX] TeX fill instead of LaTeX fill for \subsection at top of file

[Chris Pickett]

Hi,

If I have:

\subsection
% comment
text

in a file and edit it, I end up in TeX Fill mode instead of LaTeX Fill 
mode.  If I hit M-q in the paragraph above, it will reflow the text into 
the comment like so:

\subsection
% comment text

Is this a bug in AUCTeX?  Is there a list of things that will activate 
TeX mode instead of LaTeX mode?  Is there some way to always force LaTeX 
mode?  If it's not an AUCTeX bug, who else can I ask for help?

Thanks,
Chris