This error prevents the usage of the class/sql generator. http://propel.phpdb.org/trac/changeset/117?format=diff
In addition to the fix above I have another. dev-php5/propel-generator requires dev-lang/php to be build with the "simplexml" USE flag. Line 18 in /usr/share/php5/data/propel_generator/templates/conf/xml.tpl: $xml = simplexml_load_string($xmlDom->saveXML());
Looking at the buglists about php-5.1 I think it's probably better to make this depend on php-5.0
dev-php5/propel-generator-1.1.1 now checks for the SimpleXML extension.
Applied http://propel.phpdb.org/trac/changeset/117?format=diff.