Upgrade failures

[Dan Hinckley]

Running 'port outdated' returns:

glib2                          2.34.3_0 < 2.36.0_0       
gnuplot                        4.6.1_1 < 4.6.2_0         
gobject-introspection          1.34.2_0 < 1.36.0_0       
harfbuzz                       0.9.12_0 < 0.9.14_0       
libffi                         3.0.11_1 < 3.0.13_0       
libpng                         1.5.14_0 < 1.5.15_0       
libxml2                        2.8.0_0 < 2.9.0_0         
sqlite3                        3.7.15.2_0 < 3.7.16_0     

If I then run 'sudo port clean' on each item, then 'sudo port upgrade' (I also ran 'sudo port clean --all sqlite3 (for example)'), each of them fails with one of the following:

--->  Configuring libffi
Error: org.macports.configure for port libffi returned: error copying "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_libffi/libffi/work/libffi-3.0.13" to "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_libffi/libffi/work/libffi-3.0.13-x86_64/libffi-3.0.13": file already exists
Please see the log file for port libffi for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_libffi/libffi/main.log
Error: Unable to upgrade port: 1

OR:
--->  Computing dependencies for sqlite3
--->  Fetching archive for sqlite3
--->  Attempting to fetch sqlite3-3.7.16_0+universal.darwin_10.i386-x86_64.tbz2 from http://mse.uk.packages.macports.org/sites/packages.macports.org/sqlite3
--->  Attempting to fetch sqlite3-3.7.16_0+universal.darwin_10.i386-x86_64.tbz2 from http://lil.fr.packages.macports.org/sqlite3
--->  Attempting to fetch sqlite3-3.7.16_0+universal.darwin_10.i386-x86_64.tbz2 from http://packages.macports.org/sqlite3
--->  Fetching distfiles for sqlite3
--->  Attempting to fetch sqlite-autoconf-3071600.tar.gz from http://fco.it.distfiles.macports.org/mirrors/macports-distfiles/sqlite3
--->  Verifying checksum(s) for sqlite3
--->  Extracting sqlite3
--->  Applying patches to sqlite3
--->  Configuring sqlite3
Error: org.macports.configure for port sqlite3 returned: configure failure: command execution failed
Please see the log file for port sqlite3 for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_databases_sqlite3/sqlite3/main.log
Error: Unable to upgrade port: 1

I can attach the separate logs but thought I would ask first if I am overlooking something basic here.

Snow Leopard 10.6.8
iMac 6 GB RAM
MacPorts version: 2.1.3
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Dan Hinckley         ⎈
dbh at suiattle.org