> Is the following a known limitation or a bug?  And if it is a
> limitation, where is it documented?
>   \documentclass{article}
>   \usepackage[latin3]{inputenc}
>   \begin{document}
>   \tableofcontents
>   \section{\'{^^b9}}
>   \end{document}
> ^^b9 is the dotless i in latin 3 -- in the TOC, the accent is
> formatted incorrectly.  BTW, it doesn't matter whether OT1 or T1 is
> used.

\'^^b9 isn't a latex command

\'{^^b9} is (and \section{\'{^^b9}} does what you would expect).

since i don't have a current lamport to hand, i don't know whether
this is documented as such.

whether a work-around for this commonly-used plain tex-ism is possible
i don't know, off-hand.