Ok. Thank you all for the help.
And, of course, sorry for my “upset behavior”.
That’s because I crashed my system (As rdb said above, just by trying to compile them from scratch).
Actually I migrated to Fedora distro (I’m not sorry for that, fortunately).
Anyway, the 1.7.2 version does not provide me the RPM package, so, whatever… I’ll have to hunt these thirdparty libraries anyway. LOL
But this time I’ll be careful.
As the topic is about Kubuntu 12.04, and now I’m no longer using it, I think I may say I’m done here. 
But anyway, I’ll give you a feedback soon, right here, just for you to know what I had to do to get it working. 
Thanks.