Really nice module and nicely coded.
Cache file deleted. You'll not face any cache related problem anymore.
JFusion is constantly worked on, updated and improved, but although there are frequent upgrades to this component it doesn't mean any extra work for you as site administrator as the JFusion component does all the work for you, it's basically just a one click update to upgrade this component to the latest version.
Support is excellent and fast and I would recommend using the JFusion component over any other forum integration solution.