"too many open files" returns

[Graham Percival]

I'm getting the "too many open files" problem again.  Using make  
external_binary web  now.

...
out-www/lilypond.texi:311: @include `point-and-click.texi': Too many  
open files.
out-www/lilypond.texi:311: @include `cheatsheet.texi': Too many open  
files.
out-www/lilypond.texi:311: @include `fdl.texi': Too many open files.
makeinfo: could not open --css-file:  
/Users/gperciva/usr/src/lilypond/Documentation/texinfo.css
./out-www/lilypond.texi:312: Prev reference to nonexistent node `GNU  
Free Documentation License' (perhaps incorrect sectioning?).
/Users/gperciva/usr/src/lilypond/Documentation/user/out-www// 
global.texi:8: Next reference to nonexistent node `Interfaces for  
programmers' (perhaps incorrect sectioning?).
/Users/gperciva/usr/src/lilypond/Documentation/user/out-www// 
global.texi:2058: Cross reference to nonexistent node `MIDI  
instruments' (perhaps incorrect sectioning?).
...

This arose a few months ago; there was a patch to texinfo that fixed  
it.  Currently I'm using the "ulimit -n 4096" workaround (where I  
increase the number of possible open files).  This isn't a big deal;  
just a heads-up that something is wrong, and that if anybody else  
encounters this problem, they can get around it in this way.

Cheers,
- Graham