[CentOS] New X crappy for older stuff?

While burning in a new desktop Epox KT-880 workstation, I'm running on my old K6-III at 360MHz. Before new X updates (put everything in today, kernel, elfutils, ntpd - Selinux issues? - xorg, ...) with my PCI ATI 7000 (Radeon) on a 19" Samsung 950b @ 1024x768 (one of 5 different resolutions I commonly use), I could scroll smoothly at reasonable rates.

With the new stuff I get severe flickering. As if the screen is "blanking", showing a little, "blanking", showing a little, ...

It's really horrible. Anybody else got some old stuff that does(n't) have symptoms? I'll say bye to this update shortly I guess, security be damned. I'm the only user and IPCop protects me.

TIA

BTW: 4.4? Anything left for that? :-)