Comment 22 for bug 226119

I am so sorry for the CAPS , I must have hurt your feelings Terence...boo-hoo!!
And who said that Qt libraries must be in /lib?! And what gives you an idea tha some program you installed from source did not put libraries in /lib or what ever other place?! And just to say, usually the library mentioned in symbol lookup errors are not the one duplicated , but rather duplicated are the ones that depends on one mentioned.
First of all you must find out ( for your specific case of kernel/linux ) what paths are defined to be searched for libraries, and then look in those places. In my case that was /lib folder.
Try using ldconfig and similar tools/commands for finding where those libraries could be.
Sometimes even sudo locate "what ever you are looking for" can help!!