portupgrade failing, portsdb error

[Drew Sanford]

I get the following error:

root at drew(/usr/ports)# portupgrade gnome-vfs
[Updating the portsdb <format:bdb_btree> in /usr/ports ... - 16885 port 
entries found 
.........1000.........2000.........3000.........4000.........5000.........6000.........7000.........8000.........9000.........10000.........11000.........12000.........13000.........14000.........15000.........16000........ 
..... done]
[missing key: categories] [Updating the portsdb <format:bdb_btree> in 
/usr/ports ... - 16885 port entries found 
.........1000.........2000.........3000.........4000.........5000.........6000.........7000.........8000.........9000.........10000.........11000.........12000.........13000.........14000.........15000.........16000........ 
..... done]
missing key: categories: Cannot read the portsdb!
/usr/local/lib/ruby/site_ruby/1.8/portsdb.rb:548:in `open_db': database 
file error (PortsDB::DBError)
        from /usr/local/lib/ruby/site_ruby/1.8/portsdb.rb:702:in `port'
        from /usr/local/lib/ruby/site_ruby/1.8/portsdb.rb:890:in 
`all_depends_list'
        from /usr/local/lib/ruby/site_ruby/1.8/pkgdb.rb:809:in `tsort_build'
        from /usr/local/lib/ruby/site_ruby/1.8/pkgdb.rb:801:in `each'
        from /usr/local/lib/ruby/site_ruby/1.8/pkgdb.rb:801:in `tsort_build'
        from /usr/local/lib/ruby/site_ruby/1.8/pkgdb.rb:823:in `sort_build'
        from /usr/local/lib/ruby/site_ruby/1.8/pkgdb.rb:827:in `sort_build!'
        from /usr/local/sbin/portupgrade:721:in `main'
        from /usr/local/lib/ruby/1.8/optparse.rb:755:in `initialize'
        from /usr/local/sbin/portupgrade:220:in `new'
        from /usr/local/sbin/portupgrade:220:in `main'
        from /usr/local/sbin/portupgrade:2084

I've got Index up to date, I've run portsdb -u, and it seems to think 
everything is good. Any recommendations? I've not seen this error 
before. Thanks in advance.