x1900xt DVI Issue

[teknopath]

Seeing 2 issues on my new pc...

x1900xt
Dell 2005FPW (widescreen 20")
DVI

1) With either CCC 6.3 and 6.4 installed, sometimes (not always) get a msg about dispaly mode not supported during POST, but everything is fine once the XP splah screen comes along

2) With 6.4, I get a garbled screen between XP splash and logon. Doesn't happen with 6.3


Thanks

teknopath