[opensuse-buildservice] debian packages pbuilder/ cowbuilder xen

Hello all, currently i try to build opensync and its plugins using oSBS. i notice some problems with building Debian etch/ubuntu Dapper packages that could be caused by the way how and which packages are preinstalled. My first question did you notice pbuilder and why choose you not to use it ? Currently i build opensync svn packages for Debian sid, etch, sarge and ubuntu dapper using a own solution based on cowbuilder. http://sourceforge.net/projects/crusty Matthias