I would reinstall.
To have fresh & clean OS and save time.
Still running "sidux 2009-02 Αιθήρ - kde-full - (200907141427)" here, no complaints. If I was to reinstall, I would probably back up a few files in /etc and save package selections with dpkg --get-selections. I may move this installation to a somewhat bigger partition with a more optimized filesystem. I'll also try a new Aptosid installation on another partition some time.