update.packages problem

I've updated to R-devel on my development machine and have lots of
packages.  The update.packages() script ends up with 33 failures, all
due to out-of-order reloading. That is, if package "abc" depends on
package "xyz", then the reinstall of abc fails with a message that
version of xyz is "built before R 3.0.0: please re-install it".

So I ran it a second time, and got 32 failures.  There should be a
better way.

There is, on the help page!

checkBuilt: If ?TRUE?, a package built under an earlier minor version
           of R is considered to be ?old?.

As the NEWS file says, right at the top

       Packages need to have been installed under this version of R.
       (Pro tem, this is considered to be R-devel from April 2012.)

so my guess is that 'xyz' was not even installed under R-devel but 2.15.x.

We don't usually discuss development versions of R on R-help.

PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595