3
I hacked the code of the XOOPS 1.3x and did so many core changes it would be so much work to upgrade. I also fixed any security holes and am not using any scripts that have security flaws..
I would love to upgrade to 2.0 but right now it makes more sense to lock down 1.3x and still use it for my purposes. I love XOOPS and its a great community of coders here! I still think its the BEST CMS hands down.