port update outdated 'Failed to archivefetch aom: version @3.1.0_0'

[tom eee]

The following is the terminal output, and the main.log is attached.

DING!-17> sudo port upgrade outdated
--->  Fetching archive for aom
--->  Attempting to fetch aom-3.1.0_0.darwin_11.x86_64.tbz2 from
http://packages.macports.org/aom
--->  Attempting to fetch aom-3.1.0_0.darwin_11.x86_64.tbz2.rmd160 from
http://packages.macports.org/aom
Warning: Failed to verify signature for archive!
Error: Failed to archivefetch aom: version @3.1.0_0
Error: See
/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_multimedia_aom/aom/main.log
for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.

Thank you,
Tom
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