I specified nofb at the installer boot prompt. While the kernel bootup no longer uses framebuffer, the XFree86 driver selected is the FB.
Verified this behavior. Thanks for your report.
This defect is considered MUST-FIX for Florence Release-Candidate #1
Fixed in cvs. If we are in 'nofb' mode, anaconda never tries to access the /dev/fb0 device or run the XF86_Dev server. Thanks for your report.