"find: '/usr/...': Too many open files" when using -execdir

[Dale R. Worley]

I know I've seen something about this before:  When I use -execdir, I
get a message like:

find: '/usr/share/texlive/texmf-dist/tex4ht/ht-fonts/alias/kurier/sy-iwona': 
Too many open files
find: Failed to save working directory in order to run a command on 
'qx-iwonacap': Too many open files

But I can't find an entry in the bug tracker
(http://savannah.gnu.org/bugs/?group=findutils) about it.  (BTW, the
search facilities in that tracker are really poor.)

It seems that replacing -execdir with -exec makes that problem go
away, but as the manual page says, there are significant security
problems with -exec.

Dale