Luke 16:2 wrote:καὶ φωνήσας αὐτὸν εἶπεν αὐτῷ · τί τοῦτο ἀκούω περὶ σοὺ; ...
So he summoned him and said to him, ‘What is this that I hear about you? ... (NIV)
The NRSV's rendering is typical of many translations. It takes τί as "what" and seeing an object already there for ἀκούω, renders the whole thing with a what-cleft.
On the other hand, if τί is adverbial, it would mean something like "Why do I hear this about you?" But this is not a popular choice.
The context isn't too helpful, unfortunately, for this is a rhetorical question and we don't have dishonest steward's answer.
Any objections for an adverbial τί here?
(PS. ἀκούω here is another so-called "perfective present," see v.1 καὶ οὗτος διεβλήθη αὐτῷ.)