I have an action on Alfred Remote whose title includes a ‘µ’. It shows up fine on the Remote tab of Alfred 2's preferences, but displays as a ‘glyph missing’ box on the iPhone. I can provide screenshots if you're unable to reproduce.
I'm using:
Alfred Remote v1.0 on an iPhone 5S running iOS 8.1.3
Alfred v2.6 on a 2012 rMBP running Yosemite v10.10.2