I have just finished deploying a new BOA install .. so, version 2.0.8.
I created an initial client/site of open atrium and that succeeded .. but all subsequent attempts to create new site/clients are failing due to this error.
A quick google threw up this link (http://drupal.org/node/951296) .. suggesting that this was a known issue associated with older versions of aegir. So, it does seem like only drupal-7 based platforms would be affected by this, and that explains why the open atrium install worked.
Right now, I am running a find with grep to match all files that have that string, so I can change it to something safer for drupal-7 .. Is there an easier way to fix this?