Bugtracker Text Editing

"Your description contained illegal symbols, try again."
1. I did not use any unusal Symbol
2. Is there an Information what "illigal symbols" are?

-Imey

These:

' " #$%¨&*():~^´`£¢¬¹²³=+*{}\^

I used following symbols in my reports of the new bugtracker tho:
'
%
(
)
=
~

Beside blocking potential MySQL-Injections or similar attacks, I see no real reason to not allow those characters.
I had my own problems with posting proper calculations.