14 Jan
2008
14 Jan
'08
4:05 a.m.
The first part shouldn't be a problem. Hashes are not guaranteed to be unique.
I can't say why you get different values every time you hash the String module. It would seem like you actually create a new instance of String every time you hash it. If you do this:
mixed x = String; hash_value(x);
(3) Result: 8486372
hash_value(x);
(4) Result: 8486372
You get a more expected result. This may actually be a problem, but I can't say for sure.