Since you update, make sure to remake the pdfTeX and XeTeX formats:

texexec --make --all --pdftex

I updated to 2007-09-10 and then an error with message:

This is pdfTeX, Version 3.141592-1.40.5 (Web2C 7.5.6) (INITEX)

\write18 enabled.

(/usr/local/texlive/texmf-local/web2c/natural.tcx)

entering extended mode

! I can't write on file `cont-en.log'.

(Enter the null string to re-try, or <eof> to exit Default file extension is `.log')

Where is it that the file cont-en.log will be written?

And how can I change this location systematically (or can it be changed) to a place under my home directory?

Maybe the problem is that I install my formats locally under a user name not being super user or system administrator (just a simple security precaution).

Is the texexec script assuming here write rights need not in generally be granted to the script executing user? If so, can the script be adapted.

By the way, cont-tfm.zip comes with script files not having a+x executing rights. It is a bit of nuisance to change these everytime an update comes along -- quite frequently thus. Is it possible to change this?