we observe following failure with the toCharArray function in fuse-karaf on Windows only:

admin@s31wintest1()> "MyTest" toCharArray
[M, y, T, e, s, t]
-> OK

admin@s31wintest1()> x="MyTest"; $x toCharArray
[M, y, T, e, s, t]
-> OK

admin@s31wintest1()> config:property-set -p test test "MyTest"; (( config:property-get -p test test)) toCharArray
]M, y, T, e, s, t,
-> Failure; Expected result: [M, y, T, e, s, t]

(Note: The same fuse-karaf version on Linux produces the expected result.)