I was reading about composer in {T1116}
and clicked the link in the last comment:
https://secure.phabricator.com/chatlog/channel/%23phabricator/?at=17878
Resulting in:
Unhandled Exception ("AphrontParameterQueryException")
Expected a numeric scalar or null for %Ld conversion. Query: id IN (%Ld)
It seems that the links where changed from channel names to using just id's.
Although this probably won't cause any problems i think a hard query exception when changing some url params is never good...