From the reference guide:
DIM A$(2) = ["one", "two", "three"]
Syntax error (exp string expr)
The "2" here is a bit odd (surely this example is of size 3?) but makes no odds anyway (3 has same impact).
This is with v0.88-alpha firmware.
You've probably figured it out by now but since the array starts at base 0 instead of 1, DIM A$(2) creates an array with three elements (0, 1, & 2)
FYI this is fixed in latest nightly: basicengine-firmware-default-v0.88-alpha-678-g1dd9.tar.gz