I've been using ContentBarrier since the last major version first came out (ContentBarrierX). It's a nice program and can work well, but man, it can have a lot of problems too. Yet I keep trying to put up with it since I think it's still the best option if you need parental controls over the web.
The first version of 10.4 caused both my macs to have kernel panics when shutting down the machine. That was a HUGE problem because kernel panics can really mess up your system. It took at least a month for Intego to release an update that fixed the problem. Now that I've installed the update, I again had to disable the program because now it won't allow pages to load completely. Web pages load all items but the last, causing it to just hang there with a white screen. (ie. 43 or 44 items will load and it'll hang there).
Very disappointing. But I still have hopes that they'll fix the problem eventually and I'll happily run the application without knowing it's there. Hopefully.