F3 dock option disappeared from Grub screen

After doing a full unconditional update to my system to try resolve some KDE4.3 problems I now notice that I no longer have the F3 Dock / Undocked options on the Grub screen when booting up.

How can I get it back?

[LEFT]OK, this resolved itself. Once I had manually switched profile using the prifle switcher the F3 dock / undocked choice reappeared after the next reboot.