Much thanks to Rob from CFEclipse for pointing this out for me.
Eclipse by default does not support Unicode / UTF-8.
Turning it on, is very easy if you know where it is.
Window > Preferences > Workbench > Editors
At the bottom of that screen you can see 'Text file encoding'. Just choose the relevent one (choices range from US-ASCII to UTF-8), click the one you want, and presto, away you go.
Then just reopen the UTF-8 file you had, and presto – Unicode Support!