Wasn't sure where to post it but a download of ss3 beta the other day. It was throwing errors on install page.
The issue was files with the extension .ph
station15:SilverStripe-cms-v3.0.0-beta3 station15$ find . -type f -name '*.ph'
./framework/thirdparty/simplepie/compatibility_test/sp_compatibility_test.ph
./framework/thirdparty/zend_translate_railsyaml/library/Translate/Adapter/RailsYAML.ph
./framework/thirdparty/zend_translate_railsyaml/library/Translate/Adapter/thirdparty/sfYaml/lib/sfYaml.ph
./framework/thirdparty/zend_translate_railsyaml/library/Translate/Adapter/thirdparty/sfYaml/lib/sfYamlDumper.ph
./framework/thirdparty/zend_translate_railsyaml/library/Translate/Adapter/thirdparty/sfYaml/lib/sfYamlInline.ph
./framework/thirdparty/zend_translate_railsyaml/library/Translate/Adapter/thirdparty/sfYaml/lib/sfYamlParser.ph