I've gotten to the point where I deliberately remove all Windows-illegal characters from all tags, just so I don't run into problems like this. For example, instead of a colon I'll use a hyphen.

Ideally, Jemplode shouldn't barf on illegal characters, it should just be nice and convert them to an underscore or something.

By the way, the windows-illegal characters are:

/
\
:
*
?
"
<
>
|