[Orgmode] Tag search and "invalid face" error from htmlize-buffer

[Wanrong Lin]

Hi,

I wonder anyone has seen this:

After I do a tag search (for TODO items), if I do "htmlize-buffer" on 
the search result, I will get an "invalid face" error. Since I have 
quite some customization on my org-mode, I am not quite sure whether 
this is my problem, or org-mode, or htmlize-buffer's problem.

Thank you.

Wanrong