http://mises.org/books/liberalism.pdf
page 51

Direct reference to Italian Fascism, a bit less favourable than the above, but favourable to Fascism as better than Bolshevism

Mises was chief economic adviser to the Dolfuss, the Austrian leader who ended parliamentary democracy in Austria, there’s debate about whether Dolfuss was properly speaking a Fascist, but he was certainly an authoritarian leader who had much in common with Fascists.
This is a link to John T. Flynn’s account as posted at the Mises Institute
http://mises.org/daily/2360

I’ve just finished reading Liberalism and I can find nothing about him “openly and directly support[ing] the Italian fascist regime in ‘Liberalism’”

Citation, please?

The big problem (at least for libertarians) with Mill is utilitarianism. If you take the utilitarian “greater good” position then there’s really no limit to the evils you may attempt to justify, and every politician in this country thinks this way. It’s a cop-out at best, at worst it’s truly horrific (I’m thinking Iraq war). I can’t help but wonder if Mill hadn’t been indoctrinated with utilitarianism many things might be different today.

Mises quite openly and directly supports the Italian fascist regime in ‘Liberalism’. I chose to present Mises without referring to the most controversial parts of what he says. If you think Mises is more clearly opposed to statism than Mill, I have to disagree, and what more evidence do I need. I think Mises was someone of great intellectual stature who made a big contribution to liberal thought, and I think liberal minded people should read him and learn from him. He is not however perfect. I greatly regret Mill’s increasing leanings towards socialism, but that does not take away from the value of ‘On Liberty’ and other texts. It’s certainly wrong to say that ‘On Liberty’ is socialist or a gateway; or it could only be correct if you think that the only non-socialist choice is minarchism, which Mises does not endorse.