Yes, since 800x600 is unusable on this screen, one must reconfig. Here is /var/log/anaconda.xlog, showing how it mistakenly thinks "(hsync out of range)" for the valid and requested 1600x1200.
anaconda.xlog (text/plain), 38.80 KB, created by xunilarodef on 2007-10-19 12:19:02 UTC
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Creator: xunilarodef
Created: 2007-10-19 12:19:02 UTC
Size: 38.80 KB
Actions: View
Attachments on bug 306861: 225431 | 232461 | 237061