Source: transmission-remote-gtk Version: 1.1.1-1 transmission-remote-gtk is licensed under the GPLv2 only. libappindicator3-1 is licensed under the GPLv3 only. Therefore, distributing a transmission-remote-gtk linked against libappindicator3-1 may violate the GPL.
The fix for this should be fairly straightforward; I can simply build --without-libappindicator.