Getting a lot of - pkg_version: corrupted record (pkgdep line without argument), ignoring

[eculp]

I'm getting a lot of the following messages and have no idea how to  
find which package is causing the problem.  I'm afraid that this could  
become serious.

pkg_version: corrupted record (pkgdep line without argument), ignoring

While I'm bothering you, could someone give me some tips on the best  
ways to find corrupted files in /var/db/pkgs, /var/db/ports and any  
other places that they might be hiding.  I run
      portmaster --check-depends
      portmaster --check-port-dbdir
      pkgdb -Fu
regularly but I'm sure there is more.

Thanks,

ed