X11R7.1 nuisances (it does have bearing on classic comps)

Several months ago I upgraded my PC system to Debian 4.0 for several reasons, including being able to use X11R7.1 which was supposed to be a most excellent upgrade. I have had nothing but trouble attempting to run it as an X server for my classic-ish machines. IRIX 6.5.30/Origin200 gives random X-server crashes (when I try Xnest it crashes both Xnest and the parent X), and there is likewise wierdness when I try to use it to connect to my VAX 4000/200 running VMS v7.3 and DECwindows/Motif 1.2.6 (in Xnest windows will migrate outside of the designated server (to the :0 server), and running on it's own screen with XDM the server will often reset before I get the DECwindows "desktop", dropping me back at the XDM login screen). Anyone seen these types of problems before? It seems as though X11R7.1 just "doesn't work" remotely with R6.X and R5.x clients reliably (haven't tried it with my Suns or HP boxes). I currently was given a "new" machine (as in not classic), P4/2.8 with an nVidia 5200 (which might be the problem source) that I'm running. I've been considering whether this would be fixed in X11R7.2 or whether I should try to do a parallel install of X11R6.4 or if I should try it with a Rage128 card in place of the nVidia. ************** Get trade secrets for amazing burgers. Watch "Cooking with Tyler Florence" on AOL Food. (http://food.aol.com/tyler-florence?video=4&?NCID=aolfod000300000000…)