ClanKiller
In my point of view it is safe to use. Also I would like someone how has much experience in UBB programming such as CC to look at the code and than say if it is safe to use or not.
I hope the one how read the code would look at the if statement in ubb_lib.cgi that I have done
The code in my point of view is safe but it is a big load to the surfer since it has to search for more code and the chick statement has to search for each parenthesis in the html code.
My advise if you do not care for the load go on and install it