[Maverick] Installer

[NoOp]

I resized my Lucid partition & left a 20Gb unallocated section (from a
previous Maverick install) available to install/reinstall Maverick.
Using the Sept 29 daily Maverick liveCD (which has changed considerably
from previous versions) I select 'Install alongside other operating
systems' & the shows that my lucid is only 143.1GB (it's 173GB) and the
target /dev/sda6 is 30.2GB (it's only 20GB).

At this point I abort because I think that the installer is also picking
up the unallocated & Win7 recovery partitions & 5.9GB swap. If this is
the case then it's a pretty dangerous situation. I'll dig into it in
more detail tomorrow, but is anyone else seeing the same?

/dev/sda
 /dev/sda1 ntfs 208MB
 /dev/sda2 ntfs 104857MB (Win7)
 free space     2033MB
 /deb/sda5 ext4 173236MB (this is my lucid)
 free space     20975MB (this is the old maverick test partion)
 /dev/sda6 swap 5969MB
 /dev/sda3 ntfs 12788MB (Win7 recovery)

I can of course manually install to 'free space 20975MB', but the
differences in the 'Install alongside other operating systems' concerns
me. Why would it want to shrink my sda5?