That is very interesting, It works correctly in Firefox, but the error occurs when I tried it in IE. I will look into this soon.
I do not have a timeline setup for this as of yet. I am still finding new bugs almost every other day.
Anyway, I was looking at your preview site and I found a 404 issue, Hope it is helpful...
Lets say you route to: Board index ‹ Knowledge Base ‹ Installation ‹ How to install
and your viewing How to Install knowledge page. If you click on How to install in the bread crumbs it brings up a 404. in the url area of the browser, it is just pointing to the directory and not to a page.
Edit: Fixed on site and pushed fix to repository (Bugfix #10
I intend to live forever. So far, so good.