I'm having a few issues with 12.04 right now when manipulating large image files, which never used to occur when doing the same with 10.04. I noticed when I clean-installed that the swap partition it chose for itself was 3GB instead of the 6GB it was when I had 10.04 installed.
So if for no other reason than to see if it works I'm going to take it back up to 6GB, as seems to be recommended given I have 3GB RAM.
I've already read the Swap-FAQ, but it doesn't address the particular area I'm interested in given my system is already up and running.
My plan is to I boot off the installation CD and run GParted to resize the partitions. Currently ~400GB is data in one primary partition, and Ubuntu is installed on an extended ~100GB partition where ~97GB is for the system and ~3GB is the Swap (give or take a few GB for unallocated space).
If I do that, will my installation remain intact or will it break anything? Comparing with Windows for example, I know resizing the system partition causes problems!