Why did symlinks fix libgmodule-2.0.so.600 not found error?

[Joseph Vella]

I tried to install firefox from ports.  It didn't work, and after that kscd (a 
KDE cd player) stopped working.  Kscd would complain libgmodule-2.0.so.600 
not found.  Some searching led me to creating sysmlinks from 
libmodule-2.0.so.0 to it.  Then kscd complained about libgthread-2.0.so.600. 
After creating that symlink kscd now works.

Why did the borked firefox install do that?

Was that the right fix, should I do something different?

Most importantly, what else might be screwed up that I don't know about?


Anyone know of some good tutorials about installation trouble-shooting?  I'm 
having mostly failures so far and don't know how to recover or what I might 
be damaging?