At the time of the last Lintian run, the following possible problems were found in packages maintained by Sebastian Geiger <firstname.lastname@example.org>, listed by source package. See also the full report, including info, experimental and overridden tags. Also see their QA overview.
tilda (1.4.1-2.1) §
- tilda.appdata.xml (cc0-1.0 != gpl-2+)