I have a Diamond Stealth 64 video card [S3 Trio64 (generic)], vendor 0x5333 device 0x8811. When installing in 'default' mode, I get an X server crash (looks like an oops). I haven't copied that down yet. This is repeatable. I installed in text mode and tried to configure X, but couldn't. It probed my 640x480 capable monitor, but X refused to start with 16 bpp (which the card/monitor can do and did in 6.2). With 8bpp, which it detected when probing, I actually get a 320x200 screen, which only the bottom half showing! Bizarrely, booting with 'linux expert' seems to make it work fine. 640x480 resolution. It's still in the installer, but 'Test configuration' is working. At least, I have a 'No' button: it's been drawing the dialog box for 10 minutes now (see the swap bug I just added..). :-)
I think this was a bad CD-ROM. (See bug 12903.)