I don't know where to submit bug reports so i'll just write it here.
The "instarepl" stops evaluating all code as soon as there any what i'm guessing non ASCII characters in the buffer, even when they are inside strings.
Example:
(println "Some string with umlaut åäö")
Will stop the instarepl from evaluating, and there is no error.
Nice to see OSX support, simplifies development quite a bit for us mac users.