Just a hopefully helpful data point: I installed 1.99n this morning on my 486-66 with 20Meg RAM running 1.2.10 and XFree 3.1.1 and it ran with no problems even after entering my registration data and being restarted at least 5 times while I changed various things. I haven't run any major apps, but I did start up Lemmings, Tex-Edit, NIH Image, and Risk without problems.