Hi there!
I see(installation), many problems....
Perhaps, these suggestions can help you with the installation. I have several computers with different characteristics (four PC, RAM etc.). I use Xubuntu 32-12.10, openSuSe 12.2-32 and Win7 32-Ultimate. After building the FPC I prefer to restart my computer and then continue with the installation of Lazarus. I've never had a problem!
On Linux, restart immediately after completion of CT and twice more (FPC and Lazarus) by the end of the installation. NEVER PROBLEM!
Regards.
p.s. I use BigIDE
