As others pointed out, threads are still experimental as of Perl 5.6.1.

Also rememeber that, even when threads will be perfectly functional, programs cannot be automagically made mutli-threaded.

Global variables not used wisely and non-reentrant functions are almost always causes of trouble.

If, in your code, get() is not reentrant, you will certainly experience data consistency problems or even segfaults.

-- TMTOWTDI