I remember catching a bit of the Twitter tirade a while back. If memory serves (and it might not, so beware), Clark started by complaining about Austin being a friend then being "shady." Some of it was financial -- unreleased scenes Clark was clearly "butthurt" about (so to speak) -- but the only stuff I remember about HIV had to do with testing lag. Although I don't know if that was really what Clark was going on about.
His Twitter meltdowns were something to behold. I remember thinking he needed a good hard over-the-knee spanking, a rough fucking, then to be put to bed early.