About Tripcodes...

The FAQ here is a little vague on some points:
FAQ says short word.  Must it be a word or can it be a random string?
Max length?
Case sensitive?
Forbidden characters? (I assume # is one)
Link to more in depth info?

Thanks in advance
les

On second thought, >>2 is wrong. The tripcode input can be anything, so you can have Unicode tripcodes.
However, the DES salt and output are lower ASCII.