Tassilo Horn <tsdh@gnu.org> writes:

> Dominique Devriese <dominique.devriese@gmail.com> writes:
>
> Hi Dominique,
>
>> I'd like to report a bug about preview-latex.  It seems to be confused
>> by documents that use the todonotes package.
>
> Yes, I can reproduce that.  The todonotes package uses TikZ, and preview
> has a problem with that.  See bug#20749.

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

This is what I get with a recent AUCTeX and Emacs: