permission errors (mavericks)

[tehcog (tehcog)]

since upgrade to 2.5.2, I seem to be getting what seems to be permission related errors like:

Jun 12 17:17:13 xxx --->  Attempting to fetch dbus-1.12.8_2.darwin_13.x86_64.tbz2.rmd160 from https://packages.macports.org/dbus
Jun 12 17:17:13 xxx --->  Installing dbus @1.12.8_2
Jun 12 17:17:14 xxx --->  Cleaning dbus
Jun 12 17:17:14 xxx Error: Couldn't activate dbus 1.12.8_2: can't create directory "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_dbus": permission denied

and

Jun 12 17:17:15 xxx --->  Fetching archive for py27-lxml
Jun 12 17:17:15 xxx Error: Failed to archivefetch py27-lxml: could not set effective uid to 502: 1 Operation not permitted
Jun 12 17:17:15 xxx Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_python_py-lxml/py27-lxml/main.log for details.

any idea why? Using sudo to update / upgrade.