Had same problem on two different computers when installing from the 11.3 x64 KDE Live CD.
I noticed on both machines that, like your fdisk -l also shows (posted and underlined below), that installation setup the partitiions to slightly overlap each other which I suspect is the/a problem. In my case I fixed the problem by creating the partitions in fdisk manually, then selecting their mount point and formatting them during install but not letting the install do the partitionning in any way. This worked on both machines and the install finished and worked otherwise smooth as could be.
Code:
/dev/sda1 1 262 2103296 82 Linux swap / Solaris
Partition 1 does not end on cylinder boundary.
/dev/sda2 * 262 2127 14972928 83 Linux
/dev/sda3 2127 4866 22004736 83 Linux
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