[ubuntu-uk] Dual booting Windows 8.1 woth Ubuntu 13.10

Wed Nov 6 11:53:34 UTC 2013

Hi!
Having problems with this.
Machine is Lenovo U410 with UEFI and Intel Rapid Start.
Installing 13.04 works fine - sees the Windows OS as per normal and
allows installing into the prepared free space.
If I try to install 13.10, it doesn't detect Windows 8.1 at all.
I'm reluctant to proceed manually as I'm not sure what will happen
because of this "non-detection".
Has anyone experienced this, and is there a way round?