Comment 25 for bug 519123

Found a better work around which worked for me and other Dell owners.

Boot from CD or DVD
Highlight your preferred install option (I prefer compatibility mode)
Hit the tab key to add boot options
Add to end of existing string "mem=xxx" (without quotes and replace xxx with your memory
Hit return to start boot process

Formula to determine your memory is:
X*1024*1024*1024=mem
replace X with number of GB ram you have.
Example:
4GB Ram = 4*1024*1024*1024=4294967296

So for Dell 64 bit systems with 4GB ram, add "mem=4294967296" to the end of the boot options string.
For 6GB ram systems, add "mem=6442450944.

I've used for Ubuntu and Arch Linux and has worked both times, but without the string, my system appears to freeze but is actually performing a kernel panic.

P.S. Stumbled across this work around on the Fedora forums.