Default behaviour for configuration is dropped
In TYPO3 4.7 (and below) the default field of a configuration was a text field. With a wrong configuration type in ext_conf_template.txt now the field isn't rendered any more. There should be any fallback like it used to.
Affected extension for example current master of PhpUnit extensions (I'll investigate in this) but IMHO the default shouldn't be dropped without any notice.